Verapamil is used to treat high blood pressure. Lowering high blood pressure helps prevent strokes, heart attacks , and kidney problems. Verapamil belongs to a class of drugs known as calcium. Raw almonds If you are worried that lower blood pressure will take time and can cause some critical situation then you shouldn’t worried about how long does it take to lower the blood pressure. For most people, medication is a major part of the plan to lower their blood pressure. These drugs, also called anti-hypertensive medicine, won't cure high blood pressure. If you take this, I have a couple of questions. First how long when you take it for the first time does it bring down your BP? Also I've been peeing very frequently since I took my first dose yesterday. Combining blood pressure-lowering drugs with verapamil can lower your blood pressure to a dangerous level. If your doctor prescribes these drugs with verapamil, they will monitor your blood. Verapamil is a calcium channel blocker. It works by relaxing the muscles of your heart and blood vessels. Verapamil is used to treat hypertension (high blood pressure), angina (chest pain), and certain heart rhythm disorders. How long does it take to lower blood pressure? It depends on how high your blood pressure is, and how aggressive the drug therapy is that your doctor may be prescribing. Many doctors also begin therapy, not with drugs, but with lifestyle-change recommendations that involve healthy eating and daily exercise. Re: how long does it take for beta blocker to take effect? I started taking the non-selective beta blocker Coreg (Carvedilol) five days ago. I've noticed an immediate increase in blood pressure. User Reviews for Verapamil to treat High Blood Pressure. Also known as: Calan, Calan SR, Isoptin SR, Verelan, Verelan PM. The following information is NOT intended to endorse drugs or recommend therapy. How Does Verapamil Work? Verapamil is a type of drug called a phenylalkylamine calcium channel blocker, which can help to reduce blood pressure in a number of ways. As it blocks the calcium channels in the body, the smooth muscles surrounding the blood vessels relax and allow the vessels to expand and the blood to pass through more easily.