Diagnosis Criteria for Hypertension

1. ACC/AHA Classification (USA - 2017, reaffirmed 2025)

• If systolic and diastolic readings fall in different categories, use the higher classification.
• Diagnosis requires an average of ≥2 readings on ≥2 separate occasions.
• Patients on antihypertensive medication are classified as hypertensive regardless of current BP.

2. ESC/ESH Classification (Europe - 2023/2024)

3. Out-of-Office BP Thresholds for Hypertension Diagnosis

4. Hypertension in Children and Adolescents

• Children 1-12 years: Hypertension = BP at or above the 95th percentile (age-, sex-, and height-specific norms), or SBP ≥130 or DBP ≥80 mmHg
• Adolescents ≥13 years: Same criteria as adults (≥130/80 for Stage 1, ≥140/90 for Stage 2)
• Elevated BP in children: ≥90th percentile to <95th percentile, or ≥120/80 to <95th percentile

5. Special Situations

• Hypertension: SBP ≥140 mmHg and/or DBP ≥90 mmHg
• Severe hypertension (in preeclampsia): SBP ≥160 mmHg or DBP ≥110 mmHg on two occasions ≥4 hours apart

6. Key Diagnostic Points (2025 AHA/ACC Guideline Updates)

• Home BP monitoring (HBPM) and ambulatory BP monitoring (ABPM) are now central to confirming diagnosis - not just supplementary
• White-coat hypertension (elevated office BP, normal out-of-office BP) must be excluded before initiating therapy
• Masked hypertension (normal office BP, elevated out-of-office BP) must be detected to avoid undertreatment
• Risk stratification now uses the PREVENT calculator for 10- and 30-year total CVD risk, replacing the older Pooled Cohort Equations
• Primary aldosteronism screening is now recommended for all patients with Stage 2 or resistant hypertension, regardless of potassium level

Summary: Key Threshold Comparison

Amlodipine + Valsartan Combination

Individual Drug Profiles

Amlodipine (CCB - Dihydropyridine)

• Almost complete oral absorption; peak plasma levels at 6-12 hours
• Half-life: 30-50 hours (uniquely long among CCBs; prolonged further in elderly)
• No sustained-release formulation needed - once-daily dosing
• 90% hepatic metabolism, 10% excreted unchanged; no dose adjustment needed in renal impairment
• Antihypertensive effect may persist up to 5 days after discontinuation

Valsartan (ARB - Angiotensin II Receptor Blocker)

• Heart failure (reduces mortality/morbidity)
• Post-MI with LV dysfunction (VALIANT trial: non-inferior to captopril for all-cause mortality)
• Available as sacubitril/valsartan (Entresto) for HFrEF

Rationale for the Combination

Indications

• Hypertension not controlled by monotherapy - the primary indication (Exforge)
• Stage 2 hypertension - combination may be used as initial therapy when BP is >20/10 mmHg above target
• Hypertension with CKD or diabetes - ARB component provides additional renoprotection
• Hypertension with LV hypertrophy - ARB component reduces LVH
• Hypertension + stable angina - amlodipine also reduces anginal episodes

Available Formulations (Exforge)

Adverse Effects

Contraindications / Precautions

• Pregnancy - valsartan is teratogenic (Category D/X); discontinue immediately if pregnancy occurs
• Bilateral renal artery stenosis - ARB can precipitate acute renal failure
• Hyperkalemia - ARB caution with K+-sparing diuretics, K+ supplements, or renal disease
• Severe aortic stenosis - CCB-mediated vasodilation may cause hemodynamic compromise
• Do NOT combine with ACEi or aliskiren - dual RAAS blockade increases adverse renal outcomes without added CV benefit

Clinical Evidence

Morning or Night? With Food or Without?

Short Answer

Timing: Morning vs. Evening

The Evidence

• Its extremely long half-life (30-50 hours) means it stays in the blood far beyond 24 hours. Because of this, the time of day has minimal impact on its 24-hour BP control. Multiple studies confirm morning or evening dosing give equivalent results for amlodipine alone.

• Has a shorter half-life (6-9 hours). Previous studies suggested bedtime dosing may reduce nocturnal BP slightly more than morning dosing (by about 3 mmHg).

• Bedtime dosing reduced nighttime systolic BP by an extra 3.0 mmHg more than morning dosing
• Better nocturnal BP control rate: 79% vs. 70% (bedtime vs. morning)
• Improved circadian BP rhythm (dipping pattern)
• No increased risk of nocturnal hypotension
• No difference in daytime or 24-hour BP

Bottom Line on Timing

Food: Does It Matter?

Practical Recommendation

Take amlodipine/valsartan (Exforge) once daily at bedtime, on an empty stomach (e.g. 9 PM, 2+ hours after dinner). This gives the best nocturnal BP control, takes advantage of amlodipine's peak at 6-12 hours (overnight), and avoids the food interaction with valsartan. If you experience dizziness when standing at night, switch to morning and discuss with your doctor.

30 Minutes Before Dinner

Is It Good Enough?

Practical Verdict

Your BP Readings

This Is a Hypertensive Urgency

What You Need to Do Right Now

• Headache, visual changes, chest pain, shortness of breath, confusion - these suggest hypertensive emergency, which needs IV treatment in ICU
• Urine (protein, blood) - kidney involvement
• ECG - heart strain
• If none of these are present, it is urgency and can be managed with oral medications

Warning Signs - Go to ER Immediately If You Have Any of These

• Severe headache or head pounding
• Blurred vision or seeing spots
• Chest pain or tightness
• Shortness of breath
• Confusion or difficulty speaking
• Nausea/vomiting
• Nosebleed that won't stop
• Weakness or numbness in face/arm/leg

Do NOT

• Do not take an extra dose of your medication on your own without medical advice
• Do not lie down and hope it resolves
• Do not delay if any warning symptoms appear

You Are at 180/120 With Zero Medication on Board

You Need to Go to the Doctor or ER Tonight

1. Rule out hypertensive emergency - check if organs are already being damaged
2. Start medication today - this level of BP cannot wait for a scheduled appointment next week
3. Find out why - newly discovered hypertension at this level sometimes has a secondary cause (kidney disease, hormonal problem, etc.) that needs to be identified

What the Doctor Will Do

• Check your symptoms (headache, vision, chest, breathing)
• Blood tests - kidney function, electrolytes, blood count
• Urine test - protein or blood in urine signals kidney damage
• ECG - heart strain from high BP
• Eye exam possibly - retinal changes from hypertensive damage
• Start you on antihypertensive medication immediately

While You Wait / On Your Way

• Sit or lie quietly - avoid exertion
• No caffeine, no smoking right now
• Breathe slowly and calmly - anxiety raises BP further
• If you have any of these symptoms, call emergency services (ambulance) rather than driving yourself:
  • Chest pain
  • Difficulty breathing
  • Sudden severe headache
  • Vision changes
  • Confusion or slurred speech
  • Weakness in face, arm, or leg

The Core Message