Amlodipine and Losartan Do Not Decrease Heart Rate
Neither amlodipine nor losartan decrease heart rate in clinical practice. In fact, amlodipine may cause a slight reflex increase in heart rate with acute IV administration, though chronic oral dosing does not produce clinically significant heart rate changes 1.
Amlodipine and Heart Rate
The FDA label explicitly states that chronic oral administration of amlodipine does not lead to clinically significant changes in heart rate 1. Key pharmacodynamic findings include:
- No significant heart rate changes with chronic dosing: Blood pressure reductions occur without accompanying changes in heart rate or plasma catecholamine levels 1
- Acute vs. chronic effects differ: While acute IV amlodipine can increase heart rate, this reflex tachycardia does not occur with chronic oral therapy 1
- Preserved sinoatrial function: Amlodipine does not alter sinoatrial nodal function or atrioventricular conduction 1
Research confirms this pattern. A 24-hour ambulatory blood pressure study demonstrated that amlodipine effectively lowered blood pressure without eliciting reflex tachycardia 2. An 11-month hemodynamic study in hypertensive patients showed no significant changes in heart rate at rest or during exercise despite marked blood pressure reduction 3.
Losartan and Heart Rate
Losartan, as an angiotensin II receptor blocker, similarly does not reduce heart rate. The comparative study showed that losartan lowered blood pressure effectively without causing changes in pulse rate over 24 hours 2.
Clinical Implications
Important caveat: The 2007 ESH/ESC guidelines note that in coronary patients, it is prudent to avoid tachycardia when lowering blood pressure 4. Both amlodipine and losartan are appropriate choices in this context because they do not cause reflex tachycardia despite their vasodilatory effects.
If heart rate reduction is your therapeutic goal (e.g., for rate control in atrial fibrillation, angina management, or post-MI cardioprotection), you need a different drug class entirely—specifically beta-blockers, which are explicitly recommended for these indications 4.