Source:http://allcheappills.or g/isoptin-sr.htm
What is/are Verapamil Tablets?

VERAPAMIL is a calcium-channel blocker. It affects the amount of calcium found in your heart and muscle cells. This relaxes your blood vessels, which can reduce the amount of work the heart has to do. This medicine is used to treat chest pain caused by angina, high blood pressure, and controls heart rate in certain conditions. This medicine may be used for other purposes; ask your health care provider or pharmacist if you have questions.

Sustained-release (SR), extended-release (ER, XR, or XL), time-release or timed-release, controlled-release (CR), or continuous-release (CR or Contin) pills are tablets or capsules formulated to dissolve slowly and release a drug over time. The advantages of sustained-release tablets or capsules are that they can often be taken less frequently than instant-release formulations of the same drug, and that they keep steadier levels of the drug in the bloodstream.
What should I tell my health care providers before I take this medicine?

They need to know if you have any of these conditions:
heart or blood vessel disease
heart rhythm disturbances such as sick sinus syndrome, ventricular arrhythmias, Wolff-Parkinson-White syndrome, or Lown-Ganong-Levine syndrome
liver or kidney disease
low blood pressure
an unusual or allergic reaction to verapamil, other medicines, foods, dyes, or preservatives
pregnant or trying to get pregnant
breast-feeding
How should I use this medicine?

Take this medicine by mouth with a glass of water. Follow the directions on the prescription label. This medicine can be taken with or without food. Take your doses at regular intervals. Do not take your medicine more often than directed.

Talk to your pediatrician regarding the use of this medicine in children. Special care may be needed.
What if I miss a dose?

If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.
Source:http://allcheappills.or g/isoptin-sr.htm