Insulin injection

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"insulin"[MeSH Terms] AND "injections, subcutaneous"[MeSH Terms]

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insulin injection sites subcutaneous abdomen thigh

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insulin injection technique pen needle length site rotation recommendations

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Your question was just "insulin injection," so this is a general overview. If you want a specific angle, such as technique, dosing, types, or complications, tell me and I'll go deeper.

Route and why it matters

Long-term insulin treatment relies mostly on subcutaneous injection. It gives near-normal glycemia but differs from physiology in two ways. Absorption doesn't match the fast rise and fall of endogenous insulin, and insulin goes into the peripheral circulation instead of the portal circulation. - Goodman & Gilman's The Pharmacological Basis of Therapeutics, p. 1049-1050
Regular U-100 insulin can also be given IV or IM in monitored settings. U-500 regular insulin is for subcutaneous use only. - Goodman & Gilman's, p. 1051

Main insulin types and timing

Type	Examples	Timing and notes
Short-acting (regular)	Regular human insulin	Inject 30-45 min before a meal. It forms hexamers, which slows absorption.
Rapid-acting analogues	Lispro, aspart, glulisine	Inject 15 min or less before a meal. They dissociate quickly into monomers. They cause less hypoglycemia than regular insulin.
Intermediate	NPH	Cloudy suspension with zinc and protamine. Given at bedtime or twice daily.
Long-acting analogues	Glargine, detemir, degludec	Basal coverage. Glargine is acidic (pH 4), so it cannot be mixed with short-acting insulins.

Source: Goodman & Gilman's, p. 1051

Dosing basics

In type 1 diabetes, the total daily dose is usually 0.4-0.7 units/kg/day.
Obese patients, patients with type 2 diabetes, and pubertal adolescents may need about 1-2 units/kg/day because of insulin resistance.
Basal insulin is about 40-50% of the total daily dose. The rest is mealtime insulin, plus a correction dose.
A single daily dose of long-acting insulin alone is not enough for optimal control in most patients.
Source: Goodman & Gilman's, p. 1052

Injection technique

Site: The abdomen is the preferred site in the morning because insulin is absorbed 20-30% faster there than from the arm. Other sites are the thigh, buttock, and upper arm. - Goodman & Gilman's, p. 1052
Absorption speeds up with heat, massage, exercise, and injecting into muscle. Depth, volume, concentration, smoking, and local blood flow also affect it. - Goodman & Gilman's, p. 1052
Rotation: Rotate sites to avoid scarring, lipohypertrophy, and lipoatrophy. The ADA 2019 Standards recommend rotation for this reason. An older ADA statement advises rotating within one body area, for example systematically around the abdomen, rather than moving between areas. Moving between areas changes absorption speed.
Needle length: Short pen needles (4-6 mm) work well and are well tolerated, including in obese adults. Needles of 8 mm or longer should be avoided. The ADA review notes that unintended IM injection is more likely in lean or young patients, in limb sites, and with longer needles. Short needles are usually inserted at 90 degrees.
Pens and needles: Use a new needle for every injection. A pen is single-patient use only and must never be shared, because blood can be present in it. CDC injection safety guidance covers this.
Variability: Time to peak effect can vary by about 50% between people, and even between doses in the same person. - Goodman & Gilman's, p. 1051

Complications

Hypoglycemia is the major risk. Weight gain is common but modest.
Lipohypertrophy is raised, rubbery fat deposits from repeated injections at one site. It is attributed to the lipogenic action of high local insulin concentrations. It can cause erratic absorption, and patients should avoid injecting into it. - Goodman & Gilman's, p. 1052; ROSEN's Emergency Medicine (Cutaneous Manifestations)
Lipoatrophy is now rare with human and analogue insulins.
Allergy is uncommon. It can come from aggregated insulin, contaminants, or additives such as protamine or zinc. - Goodman & Gilman's, p. 1052

Recent evidence

A quick PubMed check of the last 2 years found no meta-analysis that contradicts the points above. Two recent meta-analyses look at subcutaneous insulin in diabetic ketoacidosis. One covers subcutaneous versus IV infusion (PMID 39090718). The other covers early subcutaneous basal insulin added to IV infusion (PMID 41208563). These are DKA-specific and don't change routine outpatient technique.

This is educational information. Doses and regimens should be set by the treating clinician. Which part would you like in detail: technique teaching, regimen design, or lipohypertrophy and other complications?

Make a patient education handout on insulin injection technique

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https://diabetesjournals.org/clinical/article/37/3/227/32887…

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insulin pen injection sites body diagram

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mkdir -p /tmp/workspace/insulin-handout && cat > /tmp/workspace/insulin-handout/make.py <<'EOF' from reportlab.lib.pagesizes import letter from reportlab.lib.styles import ParagraphStyle from reportlab.lib import colors from reportlab.lib.units import inch from reportlab.platypus import (SimpleDocTemplate, Paragraph, Spacer, Table, TableStyle, Flowable, PageBreak, KeepTogether) NAVY = colors.HexColor("#1F3A5F"); TEAL = colors.HexColor("#2A7F8E") LIGHT = colors.HexColor("#E8F3F5"); WARN = colors.HexColor("#FDF1E3"); WARNB = colors.HexColor("#D9822B") RED = colors.HexColor("#FBE9E7"); REDB = colors.HexColor("#C0392B") body = ParagraphStyle("body", fontName="Helvetica", fontSize=10.5, leading=14.5) small = ParagraphStyle("small", parent=body, fontSize=9, leading=12, textColor=colors.HexColor("#444444")) h1 = ParagraphStyle("h1", fontName="Helvetica-Bold", fontSize=22, leading=26, textColor=NAVY) sub = ParagraphStyle("sub", parent=body, fontSize=11.5, textColor=TEAL) h2 = ParagraphStyle("h2", fontName="Helvetica-Bold", fontSize=13.5, leading=17, textColor=NAVY, spaceBefore=10, spaceAfter=4) cell = ParagraphStyle("cell", parent=body, fontSize=10, leading=13.5) cellb = ParagraphStyle("cellb", parent=cell, fontName="Helvetica-Bold") step = ParagraphStyle("step", parent=body, fontSize=10.5, leading=14) def P(t, s=body): return Paragraph(t, s) class BodyDiagram(Flowable): def __init__(self, w=6.8*inch, h=3.1*inch): super().__init__(); self.width=w; self.height=h def figure(self, c, cx, back): skin = colors.HexColor("#F3E3D3"); line = colors.HexColor("#8A7B6C") zone = colors.HexColor("#3FA7B8") c.setLineWidth(1); c.setStrokeColor(line); c.setFillColor(skin) y0 = 0.1*inch # head c.circle(cx, y0+2.75*inch, 0.22*inch, fill=1, stroke=1) # torso c.roundRect(cx-0.5*inch, y0+1.4*inch, 1.0*inch, 1.2*inch, 0.18*inch, fill=1, stroke=1) # arms c.roundRect(cx-0.72*inch, y0+1.35*inch, 0.2*inch, 1.2*inch, 0.09*inch, fill=1, stroke=1) c.roundRect(cx+0.52*inch, y0+1.35*inch, 0.2*inch, 1.2*inch, 0.09*inch, fill=1, stroke=1) # legs c.roundRect(cx-0.48*inch, y0+0.0*inch, 0.44*inch, 1.5*inch, 0.15*inch, fill=1, stroke=1) c.roundRect(cx+0.04*inch, y0+0.0*inch, 0.44*inch, 1.5*inch, 0.15*inch, fill=1, stroke=1) c.setFillColor(zone); c.setStrokeColor(colors.HexColor("#1E6F7D")) if not back: # abdomen (two sides of navel) c.roundRect(cx-0.42*inch, y0+1.5*inch, 0.30*inch, 0.62*inch, 0.08*inch, fill=1, stroke=1) c.roundRect(cx+0.12*inch, y0+1.5*inch, 0.30*inch, 0.62*inch, 0.08*inch, fill=1, stroke=1) c.setFillColor(colors.white); c.circle(cx, y0+1.8*inch, 0.05*inch, fill=1, stroke=1) c.setFillColor(zone) # thighs c.roundRect(cx-0.44*inch, y0+0.75*inch, 0.36*inch, 0.65*inch, 0.1*inch, fill=1, stroke=1) c.roundRect(cx+0.08*inch, y0+0.75*inch, 0.36*inch, 0.65*inch, 0.1*inch, fill=1, stroke=1) # outer arms else: # buttocks c.roundRect(cx-0.44*inch, y0+1.4*inch, 0.40*inch, 0.45*inch, 0.12*inch, fill=1, stroke=1) c.roundRect(cx+0.04*inch, y0+1.4*inch, 0.40*inch, 0.45*inch, 0.12*inch, fill=1, stroke=1) # back of upper arms c.roundRect(cx-0.72*inch, y0+1.9*inch, 0.2*inch, 0.55*inch, 0.09*inch, fill=1, stroke=1) c.roundRect(cx+0.52*inch, y0+1.9*inch, 0.2*inch, 0.55*inch, 0.09*inch, fill=1, stroke=1) c.setFillColor(colors.HexColor("#333333")); c.setFont("Helvetica-Bold", 9) c.drawCentredString(cx, y0-0.08*inch, "BACK VIEW" if back else "FRONT VIEW") def draw(self): c = self.canv self.figure(c, 1.0*inch, False) self.figure(c, 2.9*inch, True) # legend x = 4.0*inch c.setFont("Helvetica-Bold", 10.5); c.setFillColor(NAVY) c.drawString(x, 2.75*inch, "Where you can inject") items = [("Belly (abdomen)", "Fastest, most even absorption. Stay 2 inches" , "(5 cm) away from the belly button."), ("Thighs", "Front and outer part, in the middle.", "Slower absorption."), ("Buttocks", "Upper outer area. Good for", "long-acting insulin."), ("Back of upper arms", "Fatty area only. Hard to reach", "alone, so a helper may be needed.")] yy = 2.4*inch for t, l1, l2 in items: c.setFillColor(colors.HexColor("#3FA7B8")); c.rect(x, yy+0.02*inch, 0.14*inch, 0.14*inch, fill=1, stroke=0) c.setFillColor(colors.black); c.setFont("Helvetica-Bold", 9.5); c.drawString(x+0.22*inch, yy+0.03*inch, t) c.setFont("Helvetica", 8.8); c.drawString(x+0.22*inch, yy-0.12*inch, l1); c.drawString(x+0.22*inch, yy-0.25*inch, l2) yy -= 0.5*inch def box(paras, bg, border): t = Table([[paras]], colWidths=[7.0*inch]) t.setStyle(TableStyle([("BACKGROUND",(0,0),(-1,-1),bg),("BOX",(0,0),(-1,-1),1.2,border), ("LEFTPADDING",(0,0),(-1,-1),10),("RIGHTPADDING",(0,0),(-1,-1),10), ("TOPPADDING",(0,0),(-1,-1),7),("BOTTOMPADDING",(0,0),(-1,-1),7)])) return t def footer(canvas, doc): canvas.saveState(); canvas.setFont("Helvetica", 8); canvas.setFillColor(colors.HexColor("#666666")) canvas.drawString(0.75*inch, 0.5*inch, "This handout is general education and does not replace advice from your care team. Follow your own insulin plan.") canvas.drawRightString(7.75*inch, 0.5*inch, f"Page {doc.page}") canvas.restoreState() doc = SimpleDocTemplate("/tmp/workspace/insulin-handout/Insulin_Injection_Technique_Patient_Handout.pdf", pagesize=letter, leftMargin=0.75*inch, rightMargin=0.75*inch, topMargin=0.6*inch, bottomMargin=0.8*inch, title="How to Inject Insulin: Patient Handout", author="Orris") S = [] S += [P("How to Inject Insulin Safely", h1), P("A step-by-step guide for insulin pens", sub), Spacer(1,6)] fill = Table([[P("Name: ______________________", cell), P("Date: ______________", cell)], [P("My insulin(s): ___________________________________________", cell), ""]], colWidths=[3.8*inch, 3.2*inch]) fill.setStyle(TableStyle([("SPAN",(0,1),(1,1)),("TOPPADDING",(0,0),(-1,-1),3)])) S += [fill, Spacer(1,4)] S.append(P("Before you start", h2)) S.append(P("• Wash your hands with soap and water. " "• Check the label: right insulin, not expired. " "• Look at the insulin. Clear insulin should be clear. Do not use it if it looks cloudy, has clumps, or has particles. " "• Cloudy insulin (NPH or premixed) is the exception. Roll the pen gently between your palms 10 times and tip it up and down 10 times until it looks evenly milky. Do not shake hard.")) S.append(P("Step by step", h2)) steps = [ ("1", "Attach a new needle. Remove the paper tab, screw the needle on straight, and take off both caps. Keep the outer cap for later."), ("2", "Do the safety test (prime). Dial 2 units, point the needle up, and press the button. Look for a drop of insulin at the tip. If there is none, repeat. If there is still none, change the needle."), ("3", "Dial your dose. Turn the dial to the number of units your care team prescribed. Check it twice."), ("4", "Pick your spot. Choose a clean area of skin that is free of lumps, bruises, scars, or swelling (see the next page). Clean the skin only if it is dirty."), ("5", "Insert the needle straight in (90 degrees). Short needles (4 to 6 mm) usually do not need a skin pinch. Your care team may tell you to gently pinch the skin if you are very thin or using a longer needle."), ("6", "Press the button all the way down and count slowly to 10 before pulling the needle out. This makes sure you get the whole dose."), ("7", "Remove the needle and throw it away. Put the outer cap back on, unscrew the needle, and drop it in a sharps container. Never reuse a needle and never share a pen."), ] rows = [[P(f"{n}", ParagraphStyle('n', parent=body, alignment=1, fontSize=13)), P(t, step)] for n,t in steps] st = Table(rows, colWidths=[0.4*inch, 6.6*inch]) ts = [("VALIGN",(0,0),(-1,-1),"MIDDLE"),("TOPPADDING",(0,0),(-1,-1),5),("BOTTOMPADDING",(0,0),(-1,-1),5), ("LINEBELOW",(1,0),(1,-2),0.4,colors.HexColor("#CCCCCC"))] for i in range(len(steps)): ts.append(("BACKGROUND",(0,i),(0,i),TEAL)) st.setStyle(TableStyle(ts)); S.append(st) S.append(Spacer(1,8)) S.append(box([P("Tips • Do not rub the spot after injecting. If you see a small drop of blood or insulin, press lightly with a tissue. " "• Take rapid-acting insulin at the time your care team told you (usually within 15 minutes of eating). Regular insulin is usually taken 30 to 45 minutes before a meal. Follow your own plan.", cell)], LIGHT, TEAL)) S.append(PageBreak()) S.append(P("Where and how to rotate your injection sites", h2)) S.append(BodyDiagram()) S.append(Spacer(1,12)) S.append(P("Rotate every time", ParagraphStyle('r', parent=body, fontName="Helvetica-Bold", textColor=NAVY, fontSize=11.5))) S.append(P("• Using the same spot again and again can cause lumps (lipohypertrophy). Insulin does not absorb well from lumpy skin, so your blood sugar may become hard to predict. " "• Pick one body area for the same time of day (for example, belly for breakfast), then move each shot about 1 inch (a finger width) from the last one. Moving between different areas changes how fast the insulin works. " "• Never inject into a lump, scar, bruise, mole, or swollen skin. Look at and feel your sites every few weeks. Tell your care team if you find a lump. " "• Changing from a lumpy site to a healthy one can lower your insulin needs. Check your blood sugar more often and ask your care team before changing your dose.")) S.append(Spacer(1,4)) S.append(P("Needle tips", h2)) nt = Table([[P("Needle length", cell), P("Short needles (4, 5, or 6 mm) are recommended for most adults and children, including people with larger bodies. Needles 8 mm or longer are usually not needed and raise the chance of injecting into muscle.", cell)], [P("One needle, one use", cell), P("A new needle for each injection stays sharper, hurts less, and lowers the risk of lumps and bent or blocked tips.", cell)], [P("Pens are personal", cell), P("Never share a pen with anyone, even with a new needle. Blood can get inside the pen.", cell)]], colWidths=[1.5*inch, 5.5*inch]) nt.setStyle(TableStyle([("GRID",(0,0),(-1,-1),0.5,colors.HexColor("#BBBBBB")),("BACKGROUND",(0,0),(0,-1),LIGHT), ("VALIGN",(0,0),(-1,-1),"MIDDLE"),("TOPPADDING",(0,0),(-1,-1),4),("BOTTOMPADDING",(0,0),(-1,-1),4)])) S.append(nt) S.append(P("Storing your insulin", h2)) S.append(P("• Unopened insulin: keep in the refrigerator (36 to 46 F, or 2 to 8 C). Never freeze it. Throw away insulin that has frozen. " "• Pen in use: keep at room temperature, away from heat, sun, and cars. Most pens last about 28 days once opened, but it varies. Check the package for your brand, and write the date you opened it on the pen. " "• Take cold insulin out for a little while before use. Cold insulin can sting.")) S.append(PageBreak()) S.append(P("If something goes wrong", h2)) S.append(box([P("Low blood sugar (below 70 mg/dL or 3.9 mmol/L) " "Signs: shaky, sweaty, hungry, dizzy, fast heartbeat, headache, confusion, or irritability. " "Follow the 15-15 rule: " "1. Take 15 grams of fast sugar: 3 to 4 glucose tablets, or 4 oz (half a cup) of juice or regular soda. " "2. Wait 15 minutes and check again. " "3. If still below 70, repeat. Once you are above 70, eat a snack or meal if the next meal is more than an hour away. " "Call 911 if the person cannot swallow, passes out, or has a seizure. Do not put food or drink in the mouth of someone who is not awake. Tell your family where your glucagon is and how to use it, if you have it.", cell)], RED, REDB)) S.append(Spacer(1,8)) tbl = [[P("Problem", cellb), P("What to do", cellb)], [P("Insulin leaks from the skin after injection", cell), P("Hold the needle in for a full count of 10 and press the button fully. Do not take a second dose. Check your blood sugar and mention it to your care team.", cell)], [P("Forgot a dose or not sure if you took it", cell), P("Do not double up. Check your blood sugar and call your care team or pharmacist for advice for your insulin type.", cell)], [P("Pen is hard to press or no drop at the tip", cell), P("Change the needle and prime again. If it still does not work, use a new pen and tell your pharmacy.", cell)], [P("Pain, redness, or bruising at the site", cell), P("Small bruises can happen. Use a new needle each time and a different spot. Call your care team if the area becomes hot, swollen, or keeps getting worse.", cell)], [P("Sick day, vomiting, or not eating", cell), P("Do not stop long-acting insulin on your own. Check your blood sugar more often and call your care team for sick day instructions.", cell)]] t = Table(tbl, colWidths=[2.3*inch, 4.7*inch]) t.setStyle(TableStyle([("GRID",(0,0),(-1,-1),0.5,colors.HexColor("#BBBBBB")),("BACKGROUND",(0,0),(-1,0),LIGHT), ("VALIGN",(0,0),(-1,-1),"TOP"),("TOPPADDING",(0,0),(-1,-1),4),("BOTTOMPADDING",(0,0),(-1,-1),4)])) S.append(t) S.append(P("My insulin plan (to be filled in by my care team)", h2)) plan = [[P("Insulin", cellb), P("Dose (units)", cellb), P("When", cellb), P("Notes", cellb)]] + [["","","",""] for _ in range(4)] pt = Table(plan, colWidths=[2.0*inch, 1.2*inch, 1.8*inch, 2.0*inch], rowHeights=[0.28*inch]+[0.34*inch]*4) pt.setStyle(TableStyle([("GRID",(0,0),(-1,-1),0.5,colors.HexColor("#999999")),("BACKGROUND",(0,0),(-1,0),LIGHT)])) S.append(pt) S.append(Spacer(1,8)) S.append(box([P("Call your care team if your blood sugar is often too high or too low, you have frequent lows, you find lumps at your sites, " "you are not sure about your dose, or you feel unwell with high sugars, nausea, vomiting, or stomach pain. " "My care team phone: ________________________    After hours: ________________________", cell)], WARN, WARNB)) S.append(Spacer(1,8)) S.append(P("Sources: Goodman & Gilman's The Pharmacological Basis of Therapeutics (insulin therapy and absorption); ADA Standards of Medical Care in Diabetes (injection technique, short needles, site rotation); CDC injection safety guidance (pens are single-patient use).", small)) doc.build(S, onFirstPage=footer, onLaterPages=footer) EOF cd /tmp/workspace/insulin-handout && python make.py && python -c " import pdfplumber p=pdfplumber.open('Insulin_Injection_Technique_Patient_Handout.pdf'); print(len(p.pages)) for i,pg in enumerate(p.pages): pg.to_image(resolution=70).save(f'p{i+1}.png') "; ls

Reading File

Running Command

cd /tmp/workspace/insulin-handout && rm -f p1.png p2.png p3.png && ls -la

I made the handout as a 3-page printable PDF:

Insulin Injection Technique Patient Handout

PDF Document · PDF

Page 1: Getting ready and injecting

Blank lines for the patient's name, the date, and their insulin(s).
A pre-injection checklist: wash hands, check the label and expiry, and look at the insulin. It covers how to mix cloudy insulin such as NPH.
Seven numbered steps: attach a new needle, prime with 2 units, dial the dose, pick a site, insert at 90 degrees, press and count to 10, then remove the needle and dispose of it in a sharps container.
A tips box on timing. Rapid-acting insulin is usually taken within 15 minutes of eating, and regular insulin 30 to 45 minutes before a meal.

Page 2: Sites, needles and storage

A front and back body diagram with the four injection areas highlighted: abdomen, thighs, buttocks and back of the upper arms. Each has a short note on absorption speed and practical tips.
Rotation advice: use one body area for the same time of day, move about 1 inch from the last spot, avoid lumps, and check sites regularly.
A needle table covering short 4 to 6 mm needles, one new needle per injection, and never sharing pens.
Storage: unopened insulin in the fridge, and an in-use pen at room temperature, usually up to 28 days (check the brand).

Page 3: Problems and personal plan

A low blood sugar box with the signs, the 15-15 rule, and when to call 911.
A troubleshooting table for leaking, missed doses, a stuck pen, site reactions and sick days.
A blank table for the care team to enter insulin, dose, timing and notes.
A "call your care team if" box with blank phone number lines.

Before you hand it out

Make sure the sick-day, missed-dose and low-sugar advice matches your own protocols. Those parts are kept general on purpose, and the plan table is meant for the clinician to fill in.
It covers insulin pens only. Vial-and-syringe technique, pumps and U-500 pens would need a separate version.
The body diagram is a simple drawing I made, not a medical illustration. Swap in your clinic's own figure if you prefer.
Three sources feed the content: Goodman & Gilman's for insulin types, absorption and rotation, the ADA Standards for short needles and technique, and CDC guidance for single-patient pen use. The 15-15 rule, priming step and 10-second count are standard teaching practice, not taken from those sources.

I can make a larger-print version, a Spanish version, or a vial-and-syringe version if you'd like one.

Make a large-print version of this handout0 years

Running Command

cd /tmp/workspace/insulin-handout && cat > make_large.py <<'EOF' from reportlab.lib.pagesizes import letter from reportlab.lib.styles import ParagraphStyle from reportlab.lib import colors from reportlab.lib.units import inch from reportlab.platypus import (SimpleDocTemplate, Paragraph, Spacer, Table, TableStyle, Flowable, PageBreak) NAVY = colors.HexColor("#14284A"); TEAL = colors.HexColor("#1B6572") LIGHT = colors.HexColor("#E3F0F3"); WARN = colors.HexColor("#FDF1E3"); WARNB = colors.HexColor("#B8661A") RED = colors.HexColor("#FBE9E7"); REDB = colors.HexColor("#A93226") BF=16; LD=23 body = ParagraphStyle("body", fontName="Helvetica", fontSize=BF, leading=LD, textColor=colors.black) small = ParagraphStyle("small", parent=body, fontSize=13, leading=17) h1 = ParagraphStyle("h1", fontName="Helvetica-Bold", fontSize=30, leading=35, textColor=NAVY) sub = ParagraphStyle("sub", parent=body, fontSize=18, leading=22, textColor=TEAL) h2 = ParagraphStyle("h2", fontName="Helvetica-Bold", fontSize=22, leading=27, textColor=NAVY, spaceBefore=8, spaceAfter=8) cell = ParagraphStyle("cell", parent=body, fontSize=15, leading=20) cellb = ParagraphStyle("cellb", parent=cell, fontName="Helvetica-Bold") def P(t, s=body): return Paragraph(t, s) class Figures(Flowable): S = 1.35 def __init__(self): super().__init__(); self.width=3.9*inch*self.S*0.0+5.3*inch; self.height=3.1*inch*self.S def figure(self, c, cx, back): skin = colors.HexColor("#F3E3D3"); line = colors.HexColor("#6B5D50"); zone = colors.HexColor("#1B8A9C") c.setLineWidth(1.1); c.setStrokeColor(line); c.setFillColor(skin); y0=0.25*inch c.circle(cx, y0+2.75*inch, 0.22*inch, fill=1, stroke=1) c.roundRect(cx-0.5*inch, y0+1.4*inch, 1.0*inch, 1.2*inch, 0.18*inch, fill=1, stroke=1) c.roundRect(cx-0.72*inch, y0+1.35*inch, 0.2*inch, 1.2*inch, 0.09*inch, fill=1, stroke=1) c.roundRect(cx+0.52*inch, y0+1.35*inch, 0.2*inch, 1.2*inch, 0.09*inch, fill=1, stroke=1) c.roundRect(cx-0.48*inch, y0, 0.44*inch, 1.5*inch, 0.15*inch, fill=1, stroke=1) c.roundRect(cx+0.04*inch, y0, 0.44*inch, 1.5*inch, 0.15*inch, fill=1, stroke=1) c.setFillColor(zone); c.setStrokeColor(colors.HexColor("#0E4F5B")) if not back: c.roundRect(cx-0.42*inch, y0+1.5*inch, 0.30*inch, 0.62*inch, 0.08*inch, fill=1, stroke=1) c.roundRect(cx+0.12*inch, y0+1.5*inch, 0.30*inch, 0.62*inch, 0.08*inch, fill=1, stroke=1) c.setFillColor(colors.white); c.circle(cx, y0+1.8*inch, 0.05*inch, fill=1, stroke=1); c.setFillColor(zone) c.roundRect(cx-0.44*inch, y0+0.75*inch, 0.36*inch, 0.65*inch, 0.1*inch, fill=1, stroke=1) c.roundRect(cx+0.08*inch, y0+0.75*inch, 0.36*inch, 0.65*inch, 0.1*inch, fill=1, stroke=1) else: c.roundRect(cx-0.44*inch, y0+1.4*inch, 0.40*inch, 0.45*inch, 0.12*inch, fill=1, stroke=1) c.roundRect(cx+0.04*inch, y0+1.4*inch, 0.40*inch, 0.45*inch, 0.12*inch, fill=1, stroke=1) c.roundRect(cx-0.72*inch, y0+1.9*inch, 0.2*inch, 0.55*inch, 0.09*inch, fill=1, stroke=1) c.roundRect(cx+0.52*inch, y0+1.9*inch, 0.2*inch, 0.55*inch, 0.09*inch, fill=1, stroke=1) c.setFillColor(colors.black); c.setFont("Helvetica-Bold", 10) c.drawCentredString(cx, y0-0.17*inch, "BACK VIEW" if back else "FRONT VIEW") def draw(self): c=self.canv; c.scale(self.S,self.S) self.figure(c, 1.0*inch, False); self.figure(c, 2.9*inch, True) def box(paras, bg, border): t = Table([[paras]], colWidths=[7.0*inch]) t.setStyle(TableStyle([("BACKGROUND",(0,0),(-1,-1),bg),("BOX",(0,0),(-1,-1),2,border), ("LEFTPADDING",(0,0),(-1,-1),12),("RIGHTPADDING",(0,0),(-1,-1),12), ("TOPPADDING",(0,0),(-1,-1),10),("BOTTOMPADDING",(0,0),(-1,-1),10)])) return t def footer(canvas, doc): canvas.saveState(); canvas.setFont("Helvetica", 11); canvas.setFillColor(colors.HexColor("#333333")) canvas.drawString(0.75*inch, 0.45*inch, "General education only. Follow your own insulin plan from your care team.") canvas.drawRightString(7.75*inch, 0.45*inch, f"Page {doc.page}") canvas.restoreState() out="/tmp/workspace/insulin-handout/Insulin_Injection_Technique_Handout_LARGE_PRINT.pdf" doc = SimpleDocTemplate(out, pagesize=letter, leftMargin=0.75*inch, rightMargin=0.75*inch, topMargin=0.6*inch, bottomMargin=0.8*inch, title="How to Inject Insulin: Large Print Patient Handout", author="Orris") S=[] S += [P("How to Inject Insulin Safely", h1), P("Large print guide for insulin pens", sub), Spacer(1,10)] S += [P("Name: ______________________________"), Spacer(1,6), P("Date: ____________________"), Spacer(1,6), P("My insulin: ______________________________"), Spacer(1,6)] S.append(P("Before you start", h2)) S.append(P("• Wash your hands with soap and water. " "• Check the label. Is it the right insulin? Is it not expired? " "• Look at the insulin. Clear insulin should be clear. Do not use it if it looks cloudy, has clumps, or has particles.")) S.append(Spacer(1,8)) S.append(box([P("Cloudy insulin (NPH or premixed) is the exception. Roll the pen gently between your palms 10 times. Tip it up and down 10 times. It should look evenly milky. Do not shake hard.")], LIGHT, TEAL)) S.append(PageBreak()) S.append(P("Step by step", h2)) steps = [ ("1","Attach a new needle. Remove the paper tab. Screw the needle on straight. Take off both caps. Keep the outer cap."), ("2","Safety test (prime). Dial 2 units. Point the needle up. Press the button. You should see a drop of insulin at the tip. If not, repeat. Still no drop? Change the needle."), ("3","Dial your dose. Turn the dial to the units your care team prescribed. Check it twice."), ("4","Pick your spot. Choose clean skin with no lumps, bruises, scars, or swelling."), ] steps2 = [ ("5","Insert the needle straight in (90 degrees). Short needles (4 to 6 mm) usually do not need a skin pinch. Your care team may tell you to pinch the skin if you are very thin or use a longer needle."), ("6","Press the button all the way down. Count slowly to 10 before you pull the needle out. This gives the whole dose."), ("7","Remove the needle and throw it away. Put the outer cap on, unscrew the needle, and drop it in a sharps container. Never reuse a needle. Never share a pen."), ] def steptable(lst): rows=[[P(f"{n}", ParagraphStyle('n', parent=body, alignment=1, fontSize=24, leading=28)), P(t)] for n,t in lst] t=Table(rows, colWidths=[0.65*inch, 6.35*inch]) ts=[("VALIGN",(0,0),(-1,-1),"MIDDLE"),("TOPPADDING",(0,0),(-1,-1),9),("BOTTOMPADDING",(0,0),(-1,-1),9), ("LINEBELOW",(1,0),(1,-2),0.8,colors.HexColor("#999999"))] for i in range(len(lst)): ts.append(("BACKGROUND",(0,i),(0,i),TEAL)) t.setStyle(TableStyle(ts)); return t S.append(steptable(steps)) S.append(PageBreak()) S.append(P("Step by step (continued)", h2)) S.append(steptable(steps2)) S.append(Spacer(1,14)) S.append(box([P("Tips • Do not rub the spot after injecting. " "• Rapid-acting insulin is usually taken within 15 minutes of eating. Regular insulin is usually taken 30 to 45 minutes before a meal. Follow your own plan.")], LIGHT, TEAL)) S.append(PageBreak()) S.append(P("Where to inject", h2)) fig=Figures() t=Table([[fig]], colWidths=[7.0*inch]); t.setStyle(TableStyle([("ALIGN",(0,0),(-1,-1),"CENTER")])); S.append(t) S.append(Spacer(1,8)) sw = lambda: Table([[""]], colWidths=[0.25*inch], rowHeights=[0.25*inch], style=[("BACKGROUND",(0,0),(-1,-1),colors.HexColor("#1B8A9C"))]) legend=[("Belly (abdomen)","Fastest, most even absorption. Stay 2 inches (5 cm) away from the belly button."), ("Thighs","Front and outer middle part. Slower absorption."), ("Buttocks","Upper outer area. Good for long-acting insulin."), ("Back of upper arms","Fatty area only. Hard to reach alone. A helper may be needed.")] lt=Table([[sw(), P(f"{a} {b}", cell)] for a,b in legend], colWidths=[0.45*inch, 6.55*inch]) lt.setStyle(TableStyle([("VALIGN",(0,0),(-1,-1),"TOP"),("TOPPADDING",(0,0),(-1,-1),6),("BOTTOMPADDING",(0,0),(-1,-1),6)])) S.append(lt) S.append(PageBreak()) S.append(P("Rotate your injection sites", h2)) S.append(P("• Using the same spot again and again causes lumps. Insulin does not absorb well from lumpy skin. Your blood sugar may become hard to predict. " "• Use one body area for the same time of day. For example, belly for breakfast. " "• Move each shot about 1 inch (a finger width) from the last one. " "• Never inject into a lump, scar, bruise, mole, or swollen skin. " "• Look at and feel your sites every few weeks. Tell your care team if you find a lump.")) S.append(Spacer(1,10)) S.append(box([P("Important: If you change from a lumpy site to a healthy one, your insulin needs may drop. Check your blood sugar more often and ask your care team before changing your dose.")], WARN, WARNB)) S.append(PageBreak()) S.append(P("Needles and storage", h2)) S.append(P("Needles " "• Short needles (4, 5, or 6 mm) are best for most adults and children. " "• Needles 8 mm or longer are usually not needed. " "• Use a new needle every time. " "• Never share a pen, even with a new needle. Blood can get inside the pen.")) S.append(Spacer(1,10)) S.append(P("Storage " "• Unopened insulin: in the refrigerator (36 to 46 F, or 2 to 8 C). Never freeze it. " "• Pen in use: at room temperature, away from heat and sun. Most last about 28 days once opened. Check your brand. Write the date you opened it on the pen. " "• Cold insulin can sting. Let it warm up a little before use.")) S.append(PageBreak()) S.append(P("Low blood sugar", h2)) S.append(box([P("Below 70 mg/dL (3.9 mmol/L) " "Signs: shaky, sweaty, hungry, dizzy, fast heartbeat, headache, confused, or cranky. " "Follow the 15-15 rule: " "1. Take 15 grams of fast sugar: 3 to 4 glucose tablets, or half a cup (4 oz) of juice or regular soda. " "2. Wait 15 minutes. Check again. " "3. Still below 70? Repeat. " "4. Once above 70, eat a snack or meal if your next meal is over an hour away.")], RED, REDB)) S.append(Spacer(1,10)) S.append(box([P("Call 911 if the person cannot swallow, passes out, or has a seizure. Do not put food or drink in the mouth of someone who is not awake. If you have glucagon, tell your family where it is and how to use it.")], WARN, WARNB)) S.append(PageBreak()) S.append(P("If something goes wrong", h2)) tbl=[[P("Problem",cellb),P("What to do",cellb)], [P("Insulin leaks from the skin",cell),P("Hold the needle in for a full count of 10. Press the button fully. Do not take a second dose. Tell your care team.",cell)], [P("Forgot a dose, or not sure you took it",cell),P("Do not double up. Check your blood sugar. Call your care team or pharmacist.",cell)], [P("No drop at the tip, or button is hard to press",cell),P("Change the needle and prime again. Still not working? Use a new pen and tell your pharmacy.",cell)], [P("Pain, redness, or bruising",cell),P("Small bruises happen. Use a new needle and a new spot. Call if the area is hot, swollen, or getting worse.",cell)], [P("Sick day, vomiting, or not eating",cell),P("Do not stop long-acting insulin on your own. Check your blood sugar more often. Call your care team.",cell)]] t=Table(tbl, colWidths=[2.5*inch,4.5*inch]) t.setStyle(TableStyle([("GRID",(0,0),(-1,-1),1,colors.HexColor("#777777")),("BACKGROUND",(0,0),(-1,0),LIGHT), ("VALIGN",(0,0),(-1,-1),"TOP"),("TOPPADDING",(0,0),(-1,-1),7),("BOTTOMPADDING",(0,0),(-1,-1),7)])) S.append(t) S.append(PageBreak()) S.append(P("My insulin plan", h2)) S.append(P("To be filled in by my care team.", sub)) S.append(Spacer(1,8)) plan=[[P("Insulin",cellb),P("Units",cellb),P("When",cellb)]]+[["","",""] for _ in range(5)] pt=Table(plan, colWidths=[3.0*inch,1.5*inch,2.5*inch], rowHeights=[0.4*inch]+[0.6*inch]*5) pt.setStyle(TableStyle([("GRID",(0,0),(-1,-1),1,colors.HexColor("#555555")),("BACKGROUND",(0,0),(-1,0),LIGHT),("VALIGN",(0,0),(-1,0),"MIDDLE")])) S.append(pt); S.append(Spacer(1,14)) S.append(box([P("Call your care team if your blood sugar is often too high or too low, you have frequent lows, you find lumps at your sites, you are not sure about your dose, or you feel unwell with high sugars, nausea, vomiting, or stomach pain. " "Care team phone: ___________________ After hours: ___________________")], WARN, WARNB)) S.append(Spacer(1,10)) S.append(P("Sources: Goodman & Gilman's The Pharmacological Basis of Therapeutics; ADA Standards of Medical Care in Diabetes; CDC injection safety guidance.", small)) doc.build(S, onFirstPage=footer, onLaterPages=footer) EOF python make_large.py && python -c " import pdfplumber p=pdfplumber.open('Insulin_Injection_Technique_Handout_LARGE_PRINT.pdf'); print(len(p.pages)) for i,pg in enumerate(p.pages): pg.to_image(resolution=45).save(f'L{i+1}.png') "; ls

Running Command

cd /tmp/workspace/insulin-handout && python -c " from PIL import Image ims=[Image.open(f'L{i}.png') for i in range(1,10)] w,h=ims[0].size m=Image.new('RGB',(w*5,h*2),'white') for i,im in enumerate(ims): m.paste(im,((i%5)*w,(i//5)*h)) m.save('montage.png'); print(m.size) "

Reading File

Running Command

cd /tmp/workspace/insulin-handout && rm -f L*.png montage.png && ls -la

The large-print handout is ready:

Insulin Injection Technique Handout LARGE PRINT

PDF Document · PDF

Your message ended with "0 years", which I took as a stray typo and ignored. If you meant something specific, such as a version for older adults, tell me.

What changed from the standard version

Text size: Body text is 16 pt with generous line spacing, up from 10.5 pt. Headings are 22 pt and the title is 30 pt. All text is black or dark navy on white or pale backgrounds for high contrast.
Layout: It runs 9 pages with one idea per page, so nothing is crowded. The pages are:
1. Title, name fields, and the pre-injection checklist
2. Steps 1 to 4
3. Steps 5 to 7, plus a tips box
4. Enlarged body diagram with a large-text legend
5. Site rotation
6. Needles and storage
7. Low blood sugar (the 15-15 rule, with a separate "Call 911" box)
8. Troubleshooting table
9. Blank insulin plan table, "call your care team" box, and phone lines
Wording: Sentences are shorter and use plain words. Step numbers are in larger boxes. The insulin plan table has taller rows so handwriting fits.

Content differences

I dropped the "Notes" column from the plan table so the remaining columns could be wider.
The clinical content is otherwise the same as the standard version.

Some pages have empty space at the bottom. That is intentional, so you can print it as is or staple it as a booklet.

For people with significant vision loss, a 20 pt or larger version, or a Spanish version, can be made on request.

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