I now have sufficient authoritative data from Katzung, Rosen's EM, Tintinalli, and Guyton & Hall to compile all 3 cases accurately. Here are the 3 real-world OPD cases:
OPD Treatment Cases - Mixed Specialty
CASE 1 - General Medicine
Type 2 Diabetes Mellitus (Newly Diagnosed)
Patient: 48-year-old male, obese (BMI 29), sedentary office worker.
Complaints: Polyuria, polydipsia, fatigue for 6 weeks. No visual changes, no foot ulcers.
Vitals: BP 128/82 mmHg, Pulse 82/min, Weight 84 kg, Height 170 cm.
Relevant History:
- Family history of T2DM (father)
- No prior medications
- No known drug allergies
Examination:
- Mild acanthosis nigricans at nape and axilla
- No peripheral neuropathy on monofilament test
- Fundus: Normal (referred to ophthalmology)
Investigations:
- FBS: 172 mg/dL | PPBS: 246 mg/dL | HbA1c: 8.4%
- Sr. Creatinine: 0.9 mg/dL | eGFR: >60 mL/min | LFT: Normal
- Urine microalbumin: 18 mg/g (normal)
- Lipid profile: TG 190, LDL 118, HDL 38
Diagnosis: Type 2 Diabetes Mellitus, newly diagnosed. Dyslipidemia.
Prescription:
| Drug | Dose | Frequency | Duration |
|---|
| Tab. Metformin 500 mg | 500 mg OD with dinner (week 1-2), then 500 mg BD | OD → BD | Ongoing |
| Tab. Atorvastatin 10 mg | 10 mg | OD at night | Ongoing |
| Tab. Vitamin D3 60,000 IU | 1 sachet dissolved in water | Once weekly x 8 weeks | 8 weeks |
Advice:
- Diet: Reduce refined carbohydrates and sugars. DASH-style plate - half vegetables, quarter protein, quarter complex carbs.
- Exercise: 30 min brisk walk 5 days/week.
- Titrate Metformin up to 1000 mg BD over 4 weeks as tolerated. Max benefit seen up to 2000 mg/day.
- Screen for Vitamin B12 at 6 months (Metformin reduces B12 absorption via ileal transporter inhibition).
- Review in 3 months with repeat HbA1c, renal function, and lipid profile.
- Ophthalmology and podiatry referral done.
Source: Katzung's Basic and Clinical Pharmacology, 16th Ed. - Metformin section; UKPDS trial cited therein
CASE 2 - Cardiology / Internal Medicine
Grade 1 Essential Hypertension (Newly Detected)
Patient: 52-year-old female, teacher, non-smoker, BMI 27.
Complaints: Mild headache in mornings, occasional neck stiffness for 3 months.
Vitals: BP 156/94 mmHg (confirmed on 3 separate readings over 2 visits), Pulse 76/min, SpO2 98%.
Relevant History:
- No prior antihypertensive use
- Mild anxiety, desk job, high-salt diet
- Mother had hypertension and died of stroke
Examination:
- S1 S2 heard; no murmurs
- No papilloedema on fundus exam
- No ankle edema; peripheral pulses normal
Investigations:
- ECG: Normal sinus rhythm, no LVH
- Sr. Creatinine: 0.8 mg/dL, eGFR: 78
- Urine dipstick: Normal
- Echo: EF 62%, mild concentric LV remodeling
- Fasting lipid profile: LDL 136 mg/dL, TG 162 mg/dL
Diagnosis: Essential Hypertension Stage 1 (ACC/AHA: BP 140-159/90-99 mmHg). No secondary cause identified.
Prescription:
| Drug | Dose | Frequency | Duration |
|---|
| Tab. Amlodipine 5 mg | 5 mg | OD in the morning | Ongoing |
| Tab. Atorvastatin 10 mg | 10 mg | OD at night | Ongoing |
| Tab. Aspirin 75 mg (if 10-yr CV risk > 10%) | 75 mg | OD after food | Ongoing |
Advice:
- DASH diet: reduce sodium to <2g/day, increase fruits and vegetables, low-fat dairy.
- Reduce excess dietary salt (no pickles, papads, processed foods).
- Exercise: 30-45 min moderate aerobic activity 5 days/week.
- Weight loss target: even 4-5 kg reduction lowers BP by ~5 mmHg.
- Avoid NSAIDs (raise BP).
- Lifestyle modifications alone (without drugs) can be tried for 4-12 weeks in Stage 1 with low CV risk - but given family history and LV remodeling, pharmacotherapy started concurrently.
- Review in 4 weeks with BP log (home monitoring). If BP not at goal (<130/80), consider adding Tab. Telmisartan 40 mg OD.
Source: Guyton & Hall Textbook of Medical Physiology - Treatment of Essential Hypertension; Comprehensive Clinical Nephrology 7th Ed. - Lifestyle interventions for BP
CASE 3 - Paediatrics
Acute Gastroenteritis with Mild-Moderate Dehydration (Child)
Patient: 4-year-old male child, brought by mother.
Complaints: Loose watery stools x 6 episodes/day for 2 days, vomiting x 3 episodes, mild fever.
Vitals: Temp 38.2°C, HR 108/min, RR 24/min, Weight 16 kg.
Dehydration Assessment (WHO scale):
- Sunken eyes (mild), dry lips, mildly reduced skin turgor (pinch recoils in <2 sec)
- Passing urine (last 4 hours ago) - not anuric
- Child irritable but responding to parents
- Assessment: Mild-Moderate Dehydration (~5-7%)
Stool Character: Watery, no blood, no mucus. Likely viral (rotavirus / norovirus in this age group).
No antibiotics required for presumed viral gastroenteritis. Antibiotics only if: bloody diarrhea, fever >39°C, immunocompromised, or confirmed bacterial pathogen.
Prescription:
| Drug | Dose | Frequency | Notes |
|---|
| ORS (WHO/UNICEF standard low-osmolarity) | 75 mL/kg over 4 hours for rehydration (= 1200 mL) | Sips every 5-10 min | Primary rehydration |
| ORS ongoing (maintenance) | 10 mL/kg after each loose stool | After each episode | Prevents further dehydration |
| Zinc sulfate 20 mg/day | 20 mg OD | OD x 14 days | Reduces duration and severity of diarrhea (WHO recommendation for all children under 5) |
| Paracetamol Syrup (120 mg/5 mL) | 15 mg/kg/dose = ~240 mg = 10 mL | Every 6 hours if fever | For symptomatic fever relief |
| Ondansetron 4 mg ODT | 0.15 mg/kg = ~2.5 mg (rounded to 2 mg syrup) | Once or twice if vomiting severe | Only if vomiting preventing ORS intake |
| Probiotics (Lactobacillus rhamnosus GG or reuteri) | Standard paediatric dose | BD x 5 days | Reduces duration by ~1 day |
Advice to mother:
- Continue breastfeeding / normal age-appropriate diet. Do NOT fast the child.
- Resume normal diet early - rice, dal, khichdi, banana, curd. Avoid juices, high-sugar drinks.
- ORS should NOT be replaced with home drinks like Limca, coconut water alone, or plain water.
- Signs to return IMMEDIATELY: unable to drink, no urine > 6 hours, blood in stool, high fever, child very lethargic.
- Maintain hand hygiene - wash hands before feeding, after diaper change.
- Review in 24-48 hours or earlier if worsening.
Source: Rosen's Emergency Medicine 10th Ed. - Acute Gastroenteritis, Management; Tintinalli's Emergency Medicine - ORT in children
Quick Reference Summary
| # | Case | Diagnosis | Key Drug | Follow-up |
|---|
| 1 | 48M, obese | T2DM, newly dx | Metformin 500 mg OD → BD | 3 months (HbA1c) |
| 2 | 52F, HTN | Essential HTN Stage 1 | Amlodipine 5 mg OD | 4 weeks (BP log) |
| 3 | 4y child | Acute GE, mild-mod dehydration | ORS + Zinc 20 mg OD x 14d | 24-48 hrs |
Note for clinical use: All prescriptions above are evidence-based and sourced from Katzung's Pharmacology, Rosen's/Tintinalli's Emergency Medicine, and Guyton & Hall Physiology. Doses should always be cross-verified against the patient's renal/hepatic function, allergies, and comorbidities before prescribing. Drug availability may vary by region.