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Hypertension Management: BP 160/90 mmHg (Average), No Comorbidities
Step 1 - Classify the Hypertension
Based on the readings provided:
| Reading | Value |
|---|
| Presenting BP | 170/100 mmHg |
| Average on multiple readings | 160/90 mmHg |
Using ACC/AHA 2017 guidelines, this patient has Stage 2 Hypertension (SBP ≥140 OR DBP ≥90 mmHg). The BP is also significantly above the treatment goal of <130/80 mmHg - the systolic is 30 mmHg above goal and the diastolic is 10 mmHg above goal.
Key decision point: Per Lippincott Pharmacology, "Patients with systolic blood pressure greater than 20 mm Hg above goal or diastolic blood pressure more than 10 mm Hg above goal should be started on two antihypertensives simultaneously." - Lippincott Illustrated Reviews: Pharmacology, p. 293
Step 2 - Start Both Lifestyle + Medication Together
Unlike Stage 1 HTN (where you can trial lifestyle for a few months), Stage 2 HTN at 160/90 requires immediate dual approach:
Lifestyle Modifications (always first/concurrent)
| Modification | Recommendation | Expected SBP Drop |
|---|
| Weight reduction | Maintain BMI 18.5-24.9 | 5-20 mmHg per 10 kg lost |
| DASH diet | High fruits, vegetables, low-fat dairy, low saturated fat | 8-14 mmHg |
| Sodium restriction | <2300 mg/day (100 mmol/day) | 2-8 mmHg |
| Aerobic exercise | Brisk walking 30 min/day, most days | 5-8 mmHg |
| Alcohol restriction | Max 2 drinks/day men, 1 drink/day women | 2-4 mmHg |
| Stop smoking | For overall CV risk reduction | - |
(Source: National Kidney Foundation Primer on Kidney Diseases, 8e, Table 64.9)
Step 3 - Drug Selection
For a patient with no comorbidities, the four first-line drug classes are:
- Thiazide/Thiazide-like diuretics (e.g., hydrochlorothiazide, chlorthalidone)
- ACE Inhibitors (e.g., enalapril, lisinopril, ramipril)
- Angiotensin Receptor Blockers / ARBs (e.g., losartan, telmisartan)
- Calcium Channel Blockers / CCBs (e.g., amlodipine)
Since this patient's BP is 30 mmHg above systolic goal, start COMBINATION therapy from day 1.
Best Recommended Starting Combination:
Amlodipine (CCB) + either ACE inhibitor or ARB
This is the most widely recommended combination per ESH/ESC 2018 guidelines - specifically:
ACE or ARB + CCB or ACE or ARB + thiazide diuretic
Practical starting doses:
| Drug | Starting Dose | Max Dose |
|---|
| Amlodipine | 2.5-5 mg once daily | 10 mg/day |
| Ramipril (ACE-I) | 2.5-5 mg once daily | 10 mg/day |
| OR Telmisartan (ARB) | 40 mg once daily | 80 mg/day |
| Losartan (ARB) | 50 mg once daily | 100 mg/day |
Step 4 - How to Decide Which Drug to Use (ACE-I vs ARB vs CCB vs Diuretic)
The choice is guided by patient-specific factors:
| Factor | Preferred Drug |
|---|
| Young patient (<55 yrs), non-black | ACE inhibitor or ARB |
| Black patient or age ≥55 yrs | CCB or Thiazide (first choice; ACE-I less effective as monotherapy) |
| Dry cough develops on ACE-I | Switch to ARB |
| History of angioedema | Avoid ACE-I; use ARB |
| High heart rate, anxiety, palpitations | Beta-blocker can be added |
| Edema, heart failure features present | Thiazide diuretic preferred |
(Source: NICE 2019 guidelines, ACC/AHA 2017)
Step 5 - Target BP and Follow-Up
- Treatment target: <130/80 mmHg (ACC/AHA 2017) for most non-elderly adults
- NICE 2019 target for age <80: <140/90 mmHg (more conservative)
- Review at: 4 weeks after starting medication
- If BP still not at goal: uptitrate doses or add a 3rd drug (the "AB+C+D" stepwise approach)
Summary Decision Algorithm for This Patient
BP 160/90 (no DM, no comorbidities)
|
▼
Stage 2 HTN → Start lifestyle + 2-drug therapy simultaneously
|
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Preferred: Amlodipine 5mg + Ramipril 5mg (or Telmisartan 40mg)
|
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Review in 4 weeks → If BP <130/80: continue
→ If not: uptitrate or add chlorthalidone
Drug classes to avoid in a healthy patient without indication: Beta-blockers are NOT first-line here (no heart disease, no tachycardia, no anxiety). Alpha-blockers are 3rd/4th line. Avoid dual RAAS blockade (ACE-I + ARB together - increased risk of renal failure and hyperkalaemia).
Quick Reference: Drug Class Comparison
Source: Lippincott Illustrated Reviews: Pharmacology - Figure 8.6, Treatment of hypertension in patients with concomitant diseases
Sources:
- Lippincott Illustrated Reviews: Pharmacology, pp. 293-295 - ACC/AHA 2017, ESH/ESC 2018, NICE 2019 guideline comparison table and drug selection
- National Kidney Foundation Primer on Kidney Diseases, 8e - Lifestyle modification table (Table 64.9)
- ACC/AHA 2017 Hypertension Guidelines (treatment target <130/80, 4 first-line drug classes)