Permethrin Lotion (1%) vs. Permethrin Cream (5%)

At a Glance

Permethrin 1% Lotion - Head Lice

• Application: Wash hair first with a non-conditioning shampoo, towel-dry, then apply permethrin 1% lotion to the scalp and full hair length. Leave on for 10 minutes, then rinse with warm water.
• Mechanism: Residual drug on the hair persists up to 10 days, designed to kill nymphs emerging from surviving eggs (nits).
• Ovicidal activity: Partial - the residual activity covers emerging nymphs, but many experts recommend a second treatment at 9-10 days regardless, especially if hair is washed soon after treatment or live lice are seen.
• Note: The 5% cream can be used off-label for head lice (applied 8-12 hours) when 1% fails, though resistance is a growing problem at both concentrations. (Dermatology 2-Volume Set 5e)

Permethrin 5% Cream - Scabies

• Application: Apply to the entire body from the neck down, including intertriginous areas, under fingernails, and between toes. In infants and young children, the scalp and face are also treated. Leave on for 8-14 hours (typically overnight), then wash off thoroughly.
• Efficacy: Two applications of 5% permethrin cream (1 week apart) have been shown to be superior to a single dose of oral ivermectin in scabies, with faster recovery. (Fitzpatrick's Dermatology)
• Crusted (Norwegian) scabies: Requires repeated courses of both topical permethrin and oral ivermectin - a single course is insufficient. (Harrison's Principles of Internal Medicine 22e)
• Pregnancy: Category B drug - considered safe for use in pregnancy.

Mechanism (Shared)

Resistance

• Resistance to permethrin 1% in head lice is increasingly widespread. Some studies still find >85-90% cure rates even in lice carrying kdr resistance mutations, suggesting other factors matter.
• When 1% fails for lice, alternatives include spinosad 0.9% suspension, ivermectin 0.5% lotion (Sklice), malathion 0.5%, or oral ivermectin.
• For scabies, resistance to 5% cream is less common but has been reported in some regions.

Side Effects (Both Formulations)

• Transient burning, stinging, pruritus, erythema, or numbness at the application site - typically mild and short-lived.
• Potential cross-sensitization to pyrethrins or chrysanthemums (though poorly documented).
• Systemic toxicity is rare given the minimal percutaneous absorption (<2%).

Key Clinical Points

1. Never swap formulations - using 1% lotion for scabies is underdosing; using 5% cream for lice is more than necessary and adds cost without proven added benefit for routine use.
2. For head lice, a second treatment at day 9-10 is strongly advised by most experts.
3. For scabies, all household contacts and close contacts should be treated simultaneously to prevent reinfestation, even if asymptomatic.
4. 5% cream is the first-line treatment for scabies per AAP Red Book, AAFP, and Fitzpatrick's guidelines.
5. 1% lotion is first-line for pediculosis per the same guidelines.

Permethrin 5% Lotion vs. Permethrin 5% Cream

The Core Difference: Vehicle / Formulation Base

Are They Clinically Equivalent?

"Children and adults with infestation should apply lotion or cream containing this scabicide over their entire body below the head." - AAP Red Book 2021

Why the Lotion Form Exists

• Lotion is easier to spread over large body surface areas, especially hairy regions.
• Some patients find lotion more cosmetically acceptable or less occlusive.
• Cream may be preferred for infants where better adherence to skin is helpful.
• In Canada and some European markets, the 5% scabies product is primarily marketed as a lotion (Kwellada-P), while in the US it is primarily marketed as a cream (Elimite/Acticin).

The Critical Confusion to Avoid

Bottom Line

• Permethrin 5% cream and 5% lotion are therapeutically equivalent for scabies when applied correctly.
• The vehicle difference (cream vs. lotion) affects spreadability and patient preference, not efficacy.
• Both require the same protocol: full-body application from neck down, 8-14 hours contact time, wash off, with a repeat dose at 1 week.
• In infants and young children, treatment also includes the face, scalp, and neck.
• Always confirm you have the 5% formulation - the 1% cream rinse is a completely different product.

Treatment of Low Platelet Count (Thrombocytopenia)

Step 1 - Find the Cause First

Treatment by Cause

1. Immune Thrombocytopenia (ITP) - Most Common

• Observation only if mild (platelets >30,000/mm³) with no significant bleeding - especially in children, who have >90% spontaneous remission rate
• First-line (moderate-severe):
  • Corticosteroids (prednisone/dexamethasone) - mainstay but 70-90% relapse on stopping
  • IVIG (IV immunoglobulin) - rapid response, used when fast rise in platelets is needed
  • Anti-Rh(D) immune globulin - in Rh-positive patients
• Life-threatening bleeding:
  • Platelet transfusion + IVIG + high-dose steroids combined (transfused platelets are destroyed quickly in ITP, so continuous support is needed while immunotherapy takes effect)
  • Tranexamic acid (antifibrinolytic) can be added
  • Emergent splenectomy if refractory
• Second-line / chronic ITP:
  • Rituximab (anti-CD20)
  • TPO receptor agonists - eltrombopag (oral), romiplostim (SC injection) - stimulate platelet production
  • Other immunomodulators: mycophenolate mofetil, azathioprine
  • Splenectomy (definitive in eligible patients)

2. TTP (Thrombotic Thrombocytopenic Purpura)

• Plasma exchange (plasmapheresis) with FFP - emergent, before lab confirmation if high suspicion
• Glucocorticoids alongside plasma exchange
• Do NOT transfuse platelets in TTP (can worsen thrombosis)

3. HUS (Hemolytic-Uremic Syndrome)

• Supportive care with aggressive IV hydration (crystalloids)
• RBC and platelet transfusions as needed
• Antihypertensives, neurologic monitoring
• Eculizumab for atypical HUS (complement-mediated)

4. Drug-Induced Thrombocytopenia (including HIT)

• Stop the offending drug immediately (permanently)
• Transfuse if severe thrombocytopenia with risk of intracranial/intrapulmonary hemorrhage
• For HIT: switch to non-heparin anticoagulant (argatroban, fondaparinux)

5. Bone Marrow Failure / Chemotherapy-Induced

• Prophylactic platelet transfusion when count <10,000/mm³ (or <20,000 with fever/active infection)
• Treat underlying condition (chemotherapy completion, stem cell transplant for aplastic anemia)
• Growth factors: eltrombopag, romiplostim in some settings

6. Nutritional (B12/Folate deficiency)

• Replace the deficient vitamin - platelets recover with treatment

Platelet Transfusion Thresholds (Evidence-Based)

Fluid Recommendations in Thrombocytopenia

Context 1 - Dengue Fever with Thrombocytopenia (most common reason this question comes up)

• Oral fluids first for non-severe dengue (30-35 mL/kg/day in adults)
• IV Crystalloids are first-line if IV fluids needed:
  • Lactated Ringer's (LR) - preferred crystalloid; avoid in severe hyponatremia
  • 0.9% Normal Saline - use cautiously; large volumes cause hyperchloremic acidosis
• Colloids (albumin 20-25%) - only in refractory shock after crystalloids fail; use up to 2 doses
  • Avoid dextrans - can worsen hemorrhage
• Platelet transfusion is NOT routinely recommended in dengue hemorrhagic shock (contrary to common practice) - the thrombocytopenia is transient and resolves with viral clearance

Context 2 - Coagulopathy / Massive Transfusion / DIC

• Balanced resuscitation: packed RBCs + FFP + platelets in a 1:1:1 ratio (massive transfusion protocol)
• FFP also serves as a plasma expander
• Crystalloids (LR or NS) for volume; avoid excessive crystalloid (causes dilutional thrombocytopenia)

Context 3 - HUS with Thrombocytopenia

• Aggressive IV crystalloid hydration is the cornerstone of early management

Context 4 - TTP

• Plasma exchange uses FFP as the replacement fluid

Summary Table

Treatment Plan - Mrs. Saraswati, 40F (USG dated 13 July 2026)

Summary of Findings

Important note: This is a clinical guidance based on USG findings alone. A gynecologist must evaluate this patient, as treatment depends heavily on symptoms (pelvic pain, fever, menstrual irregularity, vaginal discharge), menstrual cycle phase, and examination findings.

PROBLEM 1 - PID (Pelvic Inflammatory Disease) with POD Fluid

Assessment First

• Confirm clinical criteria: cervical motion tenderness, uterine tenderness, or adnexal tenderness on examination
• Check vitals (fever?), vaginal discharge, severity of pain
• Swabs: cervical/vaginal swabs for N. gonorrhoeae, Chlamydia trachomatis, Mycoplasma genitalium
• CBC, CRP/ESR, urine culture, pregnancy test (rule out ectopic)

Indications for Hospital Admission

• Surgical emergency cannot be excluded (appendicitis, ectopic)
• High fever, nausea, vomiting preventing oral medications
• Tubo-ovarian abscess suspected
• Pregnancy
• Failure of outpatient treatment
• Cannot tolerate oral regimen

Antibiotic Treatment (CDC/Harrison's 2021 Guidelines)

Outpatient Regimen (mild-to-moderate PID):

• Ceftriaxone 500 mg IM - single dose (day 1) PLUS
• Doxycycline 100 mg PO twice daily x 14 days PLUS
• Metronidazole 500 mg PO twice daily x 14 days

Inpatient / Parenteral Regimen (severe PID):

• Cefotetan 2g IV every 12 hours (or Cefoxitin 2g IV every 6 hours) PLUS
• Doxycycline 100 mg IV/PO every 12 hours
• Continue IV until 48 hours after clinical improvement, then switch to oral Doxycycline 100 mg BD + Metronidazole 500 mg BD to complete 14 days total

• Clindamycin 900 mg IV every 8 hours PLUS
• Gentamicin loading dose 2 mg/kg IV, then 1.5 mg/kg every 8 hours

Follow-up

• Reassess within 72 hours - if no clinical improvement, reconsider diagnosis and admit for IV therapy
• Abstain from sexual intercourse until treatment completed and partner treated
• Retest for gonorrhea/chlamydia 3 months after treatment if positive initially
• Partner notification and treatment is mandatory

PROBLEM 2 - Thickened Endometrium (16.9 mm)

Context Matters Critically

• Proliferative phase (Days 6-14): up to 12-13 mm at ovulation
• Secretory phase (Days 15-28): 16-18 mm is physiologically normal

• Abnormal uterine bleeding (heavy, prolonged, irregular)
• Intermenstrual bleeding
• Postcoital bleeding

Next Steps for Endometrium

1. Determine cycle day at time of scan - if secretory phase, repeat USG at early follicular phase (Days 4-6)
2. If thickening persists or patient has abnormal uterine bleeding:
   • Transvaginal ultrasound (TVS) for better characterization
   • Endometrial biopsy (Pipelle) to rule out hyperplasia or malignancy
   • Hysteroscopy + D&C if biopsy inconclusive
3. If endometrial hyperplasia without atypia is confirmed:
   • Levonorgestrel-releasing IUD (Mirena) - first-line treatment (most effective)
   • Oral progestogens (medroxyprogesterone acetate 10 mg/day for 14 days per cycle) if IUD not acceptable
   • Follow-up endometrial biopsy at 6 months
4. If atypical hyperplasia: gynecology-oncology referral; hysterectomy strongly considered in a 40-year-old

PROBLEM 3 - Left Ovarian Cyst (4.3 x 2.2 cm)

Assessment

Management

• Check CA-125 (tumor marker) - helpful especially at age 40
• No surgery needed at this size unless symptomatic or complex

Summary Action Plan

⚠️ Disclaimer: This treatment plan is for educational guidance only and must be reviewed and implemented by a qualified gynecologist who can examine the patient, correlate symptoms, and individualize treatment.

Revised Treatment Plan - Bleeding x 15 Days + USG Findings

Clinical Picture (Revised)

Most Likely Diagnosis

⚠️ Malignancy must be excluded first. Prolonged bleeding + thickened endometrium at age 40 mandates endometrial biopsy before or alongside medical treatment.

STEP 1 - URGENT INVESTIGATIONS (Do Today)

STEP 2 - IMMEDIATE TREATMENT TO STOP BLEEDING

A. Hormonal Therapy to Control Active Bleeding

• Medroxyprogesterone acetate (MPA) 10-20 mg orally 3 times daily x 7-10 days (to stop acute bleeding)
• Then taper to 10 mg once daily for Day 15-25 of each subsequent cycle for 3-6 months

• Low-dose COC (e.g., Ethinyl estradiol 30 mcg + Levonorgestrel 150 mcg) - one tablet 3 times daily x 7 days to stop bleeding, then once daily cycling
• Useful if patient also needs contraception

B. Tranexamic Acid (Antifibrinolytic) - Add to Hormonal Therapy

• Tranexamic acid 500 mg - 1g orally 3 times daily while bleeding is active
• Reduces menstrual blood loss by 30-50%
• Stop once bleeding stops (maximum 5 days per episode)

C. NSAIDs - Adjunct

• Mefenamic acid 500 mg 3 times daily with food or Ibuprofen 400-600 mg 3x/day
• Reduces prostaglandin-mediated bleeding and provides analgesia for pelvic pain

D. Iron Supplementation (for anemia from 15 days of blood loss)

• Ferrous sulfate 200 mg (65 mg elemental iron) orally twice daily between meals
• Add Vitamin C 500 mg to improve absorption
• If hemoglobin is very low (<7 g/dL), consider IV iron or blood transfusion

STEP 3 - TREAT THE CONCURRENT PID

• Ceftriaxone 500 mg IM single dose PLUS
• Doxycycline 100 mg twice daily x 14 days PLUS
• Metronidazole 500 mg twice daily x 14 days

STEP 4 - DEFINITIVE MANAGEMENT (After Biopsy Result)

If Biopsy = Endometrial Hyperplasia WITHOUT Atypia:

• Levonorgestrel-releasing IUD (Mirena/LNG-IUS) - first-line, highly effective for both stopping bleeding AND treating hyperplasia
• Oral MPA 10 mg/day for Days 14-25 each cycle x 6 months if IUD declined
• Repeat endometrial biopsy at 6 months

If Biopsy = Endometrial Hyperplasia WITH Atypia:

• Urgent gynecology-oncology referral
• At age 40 with atypical hyperplasia: total hysterectomy is strongly recommended (40% risk of concurrent endometrial cancer)
• If patient desires fertility: high-dose progestin (MPA 160 mg/day or megestrol) with close surveillance

If Biopsy = Endometrial Carcinoma:

• Urgent surgical referral - staging and hysterectomy + bilateral salpingo-oophorectomy

If Biopsy = Normal / Benign (most likely in a 40-year-old):

• Continue cyclic progestin therapy
• Consider LNG-IUD for long-term management
• Follow-up TVS in 3-6 months

For the Ovarian Cyst (4.3 cm):

• Likely functional/follicular - likely the cause of the anovulation and excess estrogen
• Repeat TVS in 6-8 weeks (Day 5-7 of a cycle after bleeding stops)
• If it resolves: no action needed
• If it persists or grows: laparoscopic evaluation
• If hormonally active (estrogen-secreting): adds urgency to treating the endometrium

STEP 5 - FOLLOW-UP PLAN

Summary Priority Order

1. ⚡ URGENT: CBC, pregnancy test, endometrial biopsy
2. ⚡ URGENT: Start PID antibiotics (Ceftriaxone IM + Doxycycline + Metronidazole)
3. 🩸 STOP BLEEDING: High-dose progestin + Tranexamic acid + NSAID
4. 💊 Iron supplementation for anemia
5. 📋 Await biopsy - tailor long-term therapy to result
6. 🔄 Repeat TVS at 6-8 weeks for cyst and endometrium

⚠️ This patient must be evaluated by a gynecologist in person. 15 days of bleeding with a thickened endometrium at age 40 requires urgent endometrial biopsy to exclude malignancy before full treatment is initiated.

Updated Plan - Trenexa 500 mg BD x 3 Days Already Taken

What This Tells Us Clinically

Key Problem

Revised Treatment Plan

1. Continue Trenexa BUT Increase the Dose

• Trenexa (tranexamic acid) 500 mg - increase to 1000 mg (2 tablets) 3 times daily for up to 5 days total
• She can continue for 2 more days at the correct dose (total 5 day course)
• Do NOT continue beyond 5 days per episode

2. ADD a Progestin Immediately - This is the Missing Drug

• Norethisterone 5 mg orally 3 times daily (total 15 mg/day) until bleeding stops (usually 3-5 days), then
• Taper to 5 mg twice daily x 7 days, then
• 5 mg once daily on Days 14-25 of each subsequent cycle for 3-6 months to regulate cycles

• MPA 10-20 mg orally twice to three times daily to stop acute bleeding, then
• Cyclic MPA 10 mg/day for Days 14-25 for maintenance

• Ethinyl estradiol 30 mcg + Levonorgestrel 150 mcg (e.g., Ovral/Triquilar) - 1 tablet 3x/day x 7 days to stop bleeding, then OD cycling

Norethisterone is widely available in India and most appropriate here given the clinical scenario.

3. Add Mefenamic Acid (NSAID) for Additional Effect

• Mefenamic acid 500 mg 3 times daily with food while bleeding is ongoing
• Reduces prostaglandin-driven uterine blood loss by 25-35% additional reduction on top of tranexamic acid
• Also helps with any pelvic pain from the PID

4. PID Antibiotics - Start Now (Not Yet Started)

• Ceftriaxone 500 mg IM single dose today
• Doxycycline 100 mg twice daily x 14 days
• Metronidazole 400-500 mg twice daily x 14 days

5. Iron - Start Now

• Ferrous ascorbate 100 mg (e.g., Orofer-XT or Ferium) once or twice daily
• Or Ferrous sulfate 200 mg twice daily between meals

Complete Revised Drug Chart

What to Expect After Adding Norethisterone

• Bleeding should reduce within 24-48 hours and stop within 3-5 days of adding norethisterone
• She may have a withdrawal bleed 3-7 days after stopping norethisterone - this is normal and expected
• If bleeding does not reduce within 48-72 hours of adding norethisterone at the above dose:
  • Hospital admission is required
  • IV/IM hormonal therapy
  • Urgent hysteroscopy + D&C (diagnostic and therapeutic)
  • Rule out endometrial pathology urgently

Urgent Investigations Still Needed (Regardless)

1. CBC - assess hemoglobin (15+ days of bleeding likely causing anemia)
2. Endometrial biopsy - mandatory at age 40 with prolonged AUB and thickened endometrium (16.9 mm)
3. Pregnancy test - must be excluded
4. TSH - thyroid dysfunction is a common missed cause

⚠️ If Hb is below 8 g/dL, consider referral for IV iron infusion or blood transfusion alongside the above treatment.

Diagnosis & Management - Mr. Jumman, 60 Years / Male (USG 14/07/2026)

DIAGNOSES (Four Concurrent Problems)

URGENT INVESTIGATIONS NEEDED FIRST

MANAGEMENT

PROBLEM 1 - Left Renal Calculus (5.7 mm)

• Tamsulosin 0.4 mg orally once daily at bedtime - alpha-1 blocker that relaxes ureteral smooth muscle, facilitating stone passage (also treats BPH simultaneously - dual benefit here)
• Maximum course: 4 weeks
• If no passage within 4 weeks → urological intervention

• Diclofenac sodium 50 mg orally 3x daily with food or
• Ketorolac 10 mg orally for acute pain episodes
• Opioids (tramadol 50 mg) if NSAID insufficient

• Oral fluids 2.5-3 litres per day to promote stone passage
• Strain urine to catch passed stone for analysis

• Ureteroscopy - most effective, higher stone-free rate
• ESWL (Extracorporeal Shock Wave Lithotripsy) - non-invasive alternative
• Percutaneous Nephrolithotomy (PCNL) - for larger or harder stones

PROBLEM 2 - Right Mild Hydronephrosis (Ureteric Pathology)

1. CT KUB (non-contrast) - urgently identify the right-sided obstructing lesion
2. RFT - if creatinine is rising → urgent urology referral
3. Watch for danger signs: fever + hydronephrosis = infected obstructed kidney = urological emergency requiring immediate drainage (ureteric stent or nephrostomy)

• Emergency urology consultation
• Possible ureteric stent insertion or percutaneous nephrostomy

• Monitor with repeat RFT in 1-2 weeks
• Follow-up USG after treatment of stones

PROBLEM 3 - Cystitis (Urinary Bladder Infection)

• Ciprofloxacin 500 mg orally twice daily x 7-10 days

• Norfloxacin 400 mg twice daily x 7 days
• Co-trimoxazole (Trimethoprim/Sulfamethoxazole) 960 mg twice daily x 7 days (if local sensitivity allows)
• Nitrofurantoin 100 mg twice daily x 7 days (avoid if GFR is reduced)

Adjust antibiotic based on urine culture sensitivity report once available.

• High fluid intake (2-3 L/day)
• Phenazopyridine (Pyridium) 200 mg 3x daily for 1-2 days for bladder discomfort (urinary analgesic)
• Avoid bladder irritants (caffeine, alcohol)

PROBLEM 4 - Benign Prostatic Enlargement Grade II with Elevated PVR

• Tamsulosin 0.4 mg once daily at bedtime (already indicated above for stone)
• OR Silodosin 8 mg once daily (more uro-selective)
• OR Alfuzosin 10 mg once daily
• Provides relief of LUTS within days to weeks

• Prostate is 36g - borderline for 5-ARI indication (usually used if >40g or PSA >1.5)
• Check PSA first before starting finasteride/dutasteride (5-ARIs halve PSA values, confounding cancer screening)
• If PSA warrants it: Finasteride 5 mg once daily or Dutasteride 0.5 mg once daily
• Takes 3-6 months for prostate size reduction

• PVR >300 mL persistently
• Recurrent UTIs from BPH
• Acute urinary retention
• Bladder stones secondary to BPH
• Renal impairment from BPH

Complete Drug Chart

Follow-Up Plan

Warning Signs - Refer to Urology/Emergency Immediately

• 🚨 Fever + flank pain + hydronephrosis = infected obstructed kidney - emergency
• 🚨 Rising creatinine = obstructive nephropathy - urgent stenting/nephrostomy
• 🚨 Inability to void = acute urinary retention - catheterization
• 🚨 PSA significantly elevated = rule out prostate cancer before any hormonal treatment

How to Stop Frequent Urination in Mr. Jumman (60M - BPH + Cystitis)

Why He Is Going So Frequently - Two Separate Reasons

BPH (Enlarged Prostate)               Cystitis (Bladder Infection)
        ↓                                        ↓
Blocks urine outflow                 Inflamed bladder wall (7.5mm)
Bladder never fully empties          Sends constant "full" signals
PVR 45 mL stays in bladder     +     Irritates stretch receptors
        ↓                                        ↓
           = Urgency + Frequency + Nocturia

Treatment - Fastest to Slowest Relief

1. ANTIBIOTIC - Fastest Relief (for the infection-driven frequency)

• Ciprofloxacin 500 mg twice daily x 7-10 days (after urine culture)
• Or Norfloxacin 400 mg twice daily x 7 days
• Once infection clears, the bladder irritation reduces and frequency decreases significantly

2. TAMSULOSIN 0.4 mg - Relief within Days (for BPH-driven frequency)

• Tamsulosin 0.4 mg once daily at bedtime
• Shown to reduce 24-hour urinary frequency from ~11 trips to ~10 trips in clinical trials within 4 weeks
• Also reduces nocturia (night-time trips) by approximately 1 episode per night
• Also aids the left renal stone expulsion (dual benefit)
• Take at bedtime to reduce dizziness risk

Expect meaningful improvement in frequency, urgency, and flow within 1-2 weeks.

3. BLADDER TRAINING - Non-Drug, Very Effective

4. LIFESTYLE CHANGES (Start Today - No Prescription Needed)

5. IF FREQUENCY PERSISTS AFTER ABOVE - Add Anticholinergic / Beta-3 Agonist

Mirabegron is preferred in elderly men with BPH because it does not increase urinary retention risk.

Summary - Priority Order to Stop Frequent Urination

Realistic Expectations

• Within 48-72 hours: Infection-driven urgency and dysuria significantly better
• Within 1-2 weeks: Frequency reducing with tamsulosin + lifestyle changes
• Within 4-6 weeks: Full benefit of tamsulosin; bladder training showing results
• If no improvement in 4-6 weeks: Urology referral for possible TURP or minimally invasive prostate procedure

Management of White Vaginal Discharge (Leucorrhoea) in Females

Step 1 - Distinguish Physiological from Pathological

Physiological (Normal) White Discharge - No Treatment Needed

Step 2 - Identify the Cause of Pathological Discharge

Step 3 - Treatment by Cause

A. Bacterial Vaginosis (BV) - Most Common

• Metronidazole 500 mg orally twice daily x 7 days (preferred)
• OR Metronidazole 2g orally as a single dose (less effective but convenient)
• OR Metronidazole 0.75% vaginal gel - one applicator (5g) intravaginally once daily x 5 days
• OR Clindamycin 2% vaginal cream - one applicator (5g) intravaginally at bedtime x 7 days
• OR Clindamycin 300 mg orally twice daily x 7 days

• No need to treat sexual partners routinely (not sexually transmitted in the classic sense)
• Avoid alcohol during and 24 hours after oral metronidazole (disulfiram-like reaction)
• Recurrence is common (50% within 12 months); consider longer suppressive therapy for recurrent BV

B. Vulvovaginal Candidiasis (Thrush) - White Curdy Discharge + Itch

• Fluconazole 150 mg orally single dose - preferred by most patients, highly effective
• OR Clotrimazole 100 mg vaginal tablet once daily x 7 days
• OR Clotrimazole 500 mg vaginal pessary - single dose
• OR Clotrimazole 1% vaginal cream once daily x 7 days
• OR Miconazole 1200 mg vaginal suppository - single dose

• Fluconazole 150 mg orally every 3 days x 3 doses (Days 1, 4, 7) for initial control, then
• Fluconazole 150 mg orally once weekly x 6 months (suppressive therapy)
• Investigate for diabetes, HIV, immunosuppression if recurrent
• Do NOT routinely treat male partners unless symptomatic

• Vaginal azoles only (clotrimazole, miconazole) - oral fluconazole is avoided in pregnancy

C. Trichomoniasis - Frothy, Malodorous Discharge

• Metronidazole 2g orally as a single dose (first-line)
• OR Metronidazole 500 mg twice daily x 7 days (if single dose fails)
• OR Tinidazole 2g orally as a single dose (equally effective, better tolerated)

• Treat sexual partner(s) simultaneously - trichomoniasis is a sexually transmitted infection
• Both partners should abstain from sex until treatment completed and symptoms gone
• Retest 3 months after treatment (high reinfection rate)

D. Other Causes of White Discharge

Step 4 - Diagnostic Workup (Before Treatment in Clinic)

Step 5 - General / Hygiene Advice (All Causes)

Quick Reference Summary

WHITE DISCHARGE
     │
     ├── Thick, curd-like + ITCHING + no odor → CANDIDA
     │       → Fluconazole 150mg single dose oral
     │
     ├── Thin, homogeneous + FISHY ODOR + no itch → BV
     │       → Metronidazole 500mg BD x 7 days
     │
     ├── Frothy, profuse + OFFENSIVE + sexual contact → TRICHOMONAS
     │       → Metronidazole 2g single dose + treat partner
     │
     ├── From cervix + post-coital bleed → CERVICITIS
     │       → Ceftriaxone + Doxycycline
     │
     └── Postmenopausal + dry + no infection → ATROPHIC
             → Topical estrogen cream

60-Year-Old Female: LLQ Pain x 15 Days + Recent Diarrhea

Differential Diagnosis

Priority Differentials

Why Diverticulitis Is the Top Diagnosis

1. LLQ pain (often described as "left-sided appendicitis")
2. Fever and/or leukocytosis
3. Change in bowel habit (constipation early, then diarrhea as inflammation spreads)

15 days of pain suggests subacute or smoldering diverticulitis - this pattern is important because it may indicate a pericolic abscess or early fistula formation rather than simple uncomplicated disease.

Why Colorectal Cancer Must Be Actively Excluded

• Age 60 female + chronic LLQ pain + change in bowel habit = classic presentation of left-sided colon cancer
• Weight loss, rectal bleeding, anorexia, or tenesmus strengthen this suspicion
• Colorectal cancer can mimic diverticulitis on CT - colonoscopy 6-8 weeks after acute episode is mandatory

Investigations

Immediate (Emergency/Urgent)

Imaging

Subsequent (After Acute Phase Resolves)

Hinchey Classification (Guides Diverticulitis Management)

Management

A. Uncomplicated Diverticulitis (No Abscess, No Perforation on CT)

• Clear liquid diet for 2-3 days, then low-residue diet as tolerated
• Progress to high-fiber diet after recovery

• Metronidazole 500 mg orally 4x/day (QID) x 4-7 days PLUS
• Ciprofloxacin 750 mg orally twice daily x 4-7 days

• Amoxicillin-clavulanate 875 mg (Co-amoxiclav) twice daily x 7 days (single agent covering gram-negatives + anaerobes)
• Moxifloxacin 400 mg once daily x 7 days
• Co-trimoxazole DS twice daily + Metronidazole

• Paracetamol (acetaminophen) 500-1000 mg every 6 hours - preferred
• Antispasmodics (mebeverine, dicyclomine) for colicky component
• Avoid NSAIDs and opioids where possible - NSAIDs may worsen diverticulitis; opioids mask clinical deterioration

• Fever >38.5°C or systemic sepsis
• Unable to tolerate oral fluids
• Peritoneal signs on examination
• Elderly, immunocompromised, significant comorbidities
• No improvement after 48-72 hours of outpatient treatment
• CT showing abscess or complicated disease

B. Moderate Diverticulitis - Inpatient (IV Antibiotics)

• IV fluid resuscitation (0.9% NaCl or Lactated Ringer's)
• Bowel rest (nil by mouth or clear fluids)
• IV Metronidazole 500 mg every 6 hours PLUS
• IV Ciprofloxacin 400 mg every 12 hours
• OR IV Ceftriaxone 1-2g every 24 hours + IV Metronidazole
• Switch to oral antibiotics when clinically improving (usually 48-72 hours)
• Analgesia: IV paracetamol, titrated opioids if needed
• NBM/NG tube if vomiting or obstruction suspected

C. Complicated Diverticulitis

D. Long-Term / Follow-Up Management

Red Flags Requiring Immediate Hospitalization/Surgery

• 🚨 Fever >38.5°C with rigors
• 🚨 Rebound tenderness / board-like abdomen (peritonitis)
• 🚨 Free air on X-ray or CT (perforation)
• 🚨 Hemodynamic instability (septic shock)
• 🚨 Inability to tolerate any oral intake
• 🚨 No improvement or worsening after 48-72 hours of treatment

Summary Algorithm

60F, LLQ pain 15 days + diarrhea
          ↓
   CT abdomen + pelvis (IV contrast)
          ↓
   ┌──────────────────────────────┐
   │                              │
Uncomplicated              Complicated
diverticulitis             (abscess/perforation)
   │                              │
Mild → Outpatient          Abscess → Drain + IV ABx
Antibiotics 4-7 days       Peritonitis → Surgery
Diet modification
   │
   ↓
Colonoscopy at 6-8 weeks
(rule out colorectal cancer)