Verapamil SE. The most common adverse effect is constipation. Other adverse effects may be hypotension, fluid retention, drowsiness and cardiac dysfunction.
Verapamil. Verapamil is a calcium channel blocker that slows conduction at the level of both the sinus node as well as the av node. This is helpful in atrial arrhythmias like afib and svt to slow the heart rate. Adverse effects could involve too slow a heart rate. It also is a vasodilator. This is helpful in hypertension and protecting against coronary spasm. Adverse events could involve too low a bp.
Slow pulse, constipa. The most common side effects of verapamil relate to an excess of what it is prescribed for: a too-slow pulse and/or too-low blood pressure. Many people also experience some degree of constipation.