Hypertension for NEET PG Medicine: ICMR 2026 Grades and Targets, Drugs, Secondary Causes, Retinopathy, Urgency vs Emergency

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🎯 Exam priority: High. Expect: classify a BP reading, when one reading is enough, targets for diabetics and the elderly, which drug to avoid in pregnancy, gout or asthma, why not ACEi + ARB, the commonest secondary cause, retinopathy grade 4, and the urgency-vs-emergency step.

CBME mapping: GM 8.1–8.19. Phaeochromocytoma and Conn syndrome pathology are in Pathology article 26; NP-NCD screening in Community Medicine.

ICMR grades, targets, drugs, urgency vs emergency, causes and retinopathy. Drawn by TrackNation.

Diagnose and Classify (ICMR 2026)

• "A silent killer": most patients are asymptomatic, so every adult ≥ 18 should have BP measured at every clinic visit.

• Diagnosis: ≥ 140/90 mm Hg on two different visits; a single visit is enough if ≥ 160/100. Use the higher category if only one value is high. Check orthostatic BP in adults ≥ 65.

• Targets: all adults < 140/90; diabetes, CKD or established CVD < 130/80 (if tolerated); age ≥ 80 < 150/90.

• White-coat hypertension: high in the clinic, normal out of the clinic.

Causes and Target Organs

• Primary hypertension is about 85%. Secondary is usually due to primary aldosteronism; others: obstructive sleep apnoea, chronic kidney disease, renal artery stenosis, coarctation (legs lower than arms), phaeochromocytoma, Cushing syndrome, thyroid and parathyroid disease, drugs (steroids, stimulants, cocaine); liquorice worsens control.

• Renovascular: about 80% atherosclerotic, 20% fibromuscular dysplasia; a renal bruit in fewer than half.

• Retinopathy (Keith-Wagener-Barker): 1 arteriolar narrowing; 2 narrowing + sclerosis; 3 haemorrhages and exudates; 4 papilloedema.

Treatment

• Lifestyle (ICMR): no tobacco or alcohol, salt < 5 g/day, more fruit and vegetables, 30 minutes of activity daily, BMI < 23 kg/m², waist < 90 cm (men) and < 80 cm (women).

• Start with two classes, preferably as a single-pill combination; monotherapy only for low-risk grade 1, age ≥ 80 or the frail. Use a CCB or thiazide-like diuretic with an ACE inhibitor or ARB; add the third class if needed; then spironolactone. Never combine two RAAS blockers (AKI risk). ICMR stepwise protocols start with amlodipine 5 mg and step up every 4 weeks.

• Beta-blockers are not first-line, but suit angina, post-MI and heart failure. ACE inhibitors/ARBs are preferred in diabetes; ACE inhibitors are contraindicated in pregnancy; dry cough is their commonest and angioedema their most serious adverse effect. Methyldopa can cause Coombs-positive haemolytic anaemia.

Urgency vs Emergency

• Urgency: ≥ 180/120 without acute target-organ damage — start oral drugs, lower BP gradually over 24–48 hours, no IV medicines, review within a week. Anxiety is the commonest cause.

• Emergency: the same levels plus target-organ damage — encephalopathy, retinopathy, pre-eclampsia/eclampsia, acute LV failure with pulmonary oedema, myocardial ischaemia, aortic dissection, renal failure. Short-acting IV drugs (labetalol, clevidipine, esmolol) then ICU titration; aim for a 20–25% fall in MAP over 1–2 hours.

Traps the Examiner Sets

• One reading ≥ 160/100 is enough to diagnose (ICMR).

• Severe BP without organ damage = urgency → oral, slow.

• ACEi + ARB together: never.

• Thiazide in gout, beta-blocker in asthma, ACEi in pregnancy — all avoid.

• Commonest secondary cause: primary aldosteronism.

Memory Hooks & Shortcuts

Shortcuts to lock in this article's numbers and lists. Each one only re-packages facts proven above.

• 🧠 120 – 140 – 160 – 180: Normal, Grade 1, Grade 2, Grade 3 steps of 20 — BP grades

• 🧠 'A + C or D': ACEi/ARB with CCB or Diuretic — drug pairing

• 🧠 Never double the RAAS — 'two rams butt heads (AKI)' — no ACEi + ARB

• 🧠 Urgency = Unhurried oral; Emergency = IV in the ER — urgency vs emergency

• 🧠 Retinopathy 4 = Four-letter 'disc' swells (papilloedema) — KWB grade 4

• 🧠 Aldo is the Usual secondary suspect — secondary hypertension

Rapid-Revision Cards

• ICMR normal BP

  < 120/80.

• ICMR elevated BP

  120–139 / 80–89: lifestyle.

• ICMR grade 1/2/3

  140–159/90–99; 160–179/100–109; ≥ 180/≥ 110.

• Diagnosis

  ≥ 140/90 on 2 visits; ≥ 160/100 once.

• Targets

  < 140/90; DM/CKD/CVD < 130/80; ≥ 80 y < 150/90.

• Initial therapy (ICMR)

  Two classes, single pill.

• Best pairing

  CCB or thiazide + ACEi/ARB.

• Never

  ACEi + ARB.

• Resistant HTN add-on

  Spironolactone (MRA).

• ACEi in pregnancy

  Contraindicated.

• ACEi side effects

  Cough (commonest), angioedema (most serious).

• Thiazide avoid

  Gout.

• Beta-blocker avoid

  Asthma, severe bradycardia, AV block.

• CCB side effects

  Pedal oedema, constipation.

• Lifestyle (ICMR)

  Salt < 5 g; BMI < 23; waist < 90/80 cm; 30 min.

• Commonest secondary cause

  Primary aldosteronism.

• Coarctation clue

  Legs BP lower than arms.

• Renovascular

  80% atherosclerosis, 20% FMD.

• Retinopathy grade 4

  Papilloedema.

• Urgency

  ≥ 180/120, no organ damage: oral, 24–48 h.

• Emergency

  + organ damage: IV, MAP ↓ 20–25% in 1–2 h.

Sources

Facts in this article were checked against these documents.

• Standard Treatment Workflow: Hypertension in Adults — ICMR / Department of Health Research, MoHFW, May 2026 (link)

• MSD Manual Professional: Hypertension; Medications for Hypertension; Hypertensive Emergencies; Renovascular Hypertension — Merck & Co. (MSD Manuals), reviewed 2025–26 (link)

• Competency Based Undergraduate Curriculum, General Medicine (GM 8) — National Medical Commission, 2024

Test Yourself: Practice Questions

Thirty questions in NEET PG style, most of them clinical vignettes.

Practice Questions (NEET PG pattern)

Original questions written in the style of the exam: +4 for a correct answer, −1 for a wrong one. Every answer was checked against the sources listed above. NEET PG papers are not published by NBEMS, so these are not past-paper questions.

Q1. A 45-year-old has BP 152/94 mm Hg on two separate clinic visits. By the ICMR 2026 workflow this is

• (a) grade 2 hypertension

• (b) grade 1 hypertension

• (c) elevated BP

• (d) normal

Q2. A reading of 166/104 mm Hg at one visit. Per ICMR, the diagnosis of hypertension

• (a) needs ambulatory monitoring always

• (b) needs three more visits

• (c) cannot be made

• (d) can be made at this single visit

Q3. BP 132/86 mm Hg is classified by ICMR as

• (a) grade 2

• (b) grade 1 hypertension

• (c) normal

• (d) elevated BP — lifestyle modification

Q4. The ICMR BP target for a hypertensive patient with diabetes is

• (a) < 130/80 mm Hg if tolerated

• (b) < 160/100

• (c) < 150/90

• (d) < 120/70 always

Q5. The ICMR target for an 84-year-old with hypertension is

• (a) no target

• (b) < 130/80

• (c) < 120/80

• (d) < 150/90 mm Hg

Q6. The ICMR default initial drug treatment for most adults with hypertension is

• (a) lifestyle only for 1 year

• (b) a beta-blocker alone

• (c) two drugs from different classes, preferably a single pill

• (d) a diuretic alone

Q7. Which combination does the ICMR workflow forbid?

• (a) chlorthalidone with an ACE inhibitor

• (b) an ACE inhibitor with an ARB

• (c) amlodipine with chlorthalidone

• (d) amlodipine with telmisartan

Q8. If BP stays uncontrolled on a CCB, ACE inhibitor/ARB and thiazide-like diuretic, the ICMR workflow suggests adding

• (a) a loop diuretic in all

• (b) a second ACE inhibitor

• (c) digoxin

• (d) a mineralocorticoid receptor antagonist such as spironolactone

Q9. A pregnant woman with chronic hypertension should NOT receive

• (a) lifestyle advice

• (b) labetalol

• (c) BP monitoring

• (d) an ACE inhibitor

Q10. A patient on enalapril develops a persistent dry cough. This is

• (a) caused by hyperkalaemia

• (b) a sign of heart failure always

• (c) the commonest adverse effect of ACE inhibitors

• (d) an allergy to all antihypertensives

Q11. A hypertensive man with recurrent gout should avoid

• (a) telmisartan

• (b) thiazide-like diuretics

• (c) losartan

• (d) amlodipine

Q12. Ankle swelling after starting amlodipine is

• (a) a sign of renal failure

• (b) a recognised side effect of CCBs

• (c) heart failure in all cases

• (d) drug allergy

Q13. A hypertensive asthmatic should not be given

• (a) chlorthalidone

• (b) amlodipine

• (c) telmisartan

• (d) a beta-blocker

Q14. Beta-blockers as antihypertensives are best reserved for patients who also have

• (a) pregnancy-planning only

• (b) asthma

• (c) angina, previous MI or heart failure

• (d) gout

Q15. The ICMR salt limit for hypertensive patients is

• (a) no limit

• (b) < 2 g/day of sodium chloride only for kidney disease

• (c) < 10 g/day

• (d) < 5 g/day

Q16. The ICMR waist circumference targets are

• (a) < 102 cm men, < 88 cm women

• (b) < 90 cm for men and < 80 cm for women

• (c) < 80 cm men, < 70 cm women

• (d) none

Q17. The commonest identifiable cause of secondary hypertension is

• (a) primary aldosteronism

• (b) Cushing syndrome

• (c) coarctation of the aorta

• (d) phaeochromocytoma

Q18. A young man has arm hypertension with much lower BP in the legs and delayed femoral pulses. The likely cause is

• (a) coarctation of the aorta

• (b) white-coat hypertension

• (c) renal artery stenosis

• (d) primary aldosteronism

Q19. A young woman's renovascular hypertension is due to fibromuscular dysplasia. Of all renovascular hypertension, this cause accounts for about

• (a) 20%

• (b) 50%

• (c) 5%

• (d) 80%

Q20. Fundoscopy in a severely hypertensive patient shows papilloedema. The Keith-Wagener-Barker grade is

• (a) 1

• (b) 2

• (c) 4

• (d) 3

Q21. Haemorrhages and exudates with arteriolar changes but no papilloedema correspond to hypertensive retinopathy grade

• (a) 4

• (b) 3

• (c) 1

• (d) 2

Q22. A patient's BP is 186/122 mm Hg; he is asymptomatic with no target-organ damage. Per ICMR, management is

• (a) sublingual nifedipine to normal within 1 hour

• (b) oral antihypertensives with gradual lowering over 24–48 hours

• (c) IV labetalol infusion in ICU

• (d) IV nitroprusside

Q23. A hypertensive emergency differs from urgency by the presence of

• (a) headache alone

• (b) age over 60

• (c) acute target-organ damage

• (d) a higher systolic number only

Q24. In a hypertensive emergency (excluding special cases), the initial goal is to lower mean arterial pressure by

• (a) 10% over 24 hours

• (b) to normal within 30 minutes

• (c) 50% within 10 minutes

• (d) 20–25% over 1–2 hours

Q25. Which is a target-organ complication defining a hypertensive emergency?

• (a) palpitations alone

• (b) white-coat effect

• (c) isolated headache with anxiety

• (d) acute aortic dissection

Q26. The commonest cause of hypertensive urgency is

• (a) phaeochromocytoma

• (b) aortic dissection

• (c) renal artery stenosis

• (d) anxiety

Q27. A patient's BP is high in clinic but normal on home and ambulatory readings. This is

• (a) grade 2 hypertension

• (b) resistant hypertension

• (c) masked hypertension

• (d) white-coat hypertension

Q28. In patients with diabetes and hypertension, the antihypertensive class of choice is

• (a) ACE inhibitor or ARB

• (b) alpha-blocker

• (c) beta-blocker

• (d) loop diuretic

Q29. Primary (essential) hypertension accounts for about

• (a) 99%

• (b) 50%

• (c) 15%

• (d) 85% of cases

Q30. An antihypertensive that can cause Coombs-positive haemolytic anaemia is

• (a) chlorthalidone

• (b) telmisartan

• (c) methyldopa

• (d) amlodipine

Active Recall

From memory: give the ICMR BP categories, diagnostic rule and targets; describe the ICMR drug strategy and forbidden combination; list contraindications and side effects of each class; name secondary causes and retinopathy grades; and contrast urgency with emergency management.