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A generic drug is a copy of the brand-name drug with the same dosage, safety, strength, quality, consumption method, performance, and intended use. Before generics become available on the market, the generic company must prove it has the same active ingredients as the brand-name drug and works in the same way and in the same amount of time in the body.
The only differences between generics and their brand-name counterparts is that generics are less expensive and may look slightly different (eg. different shape or color), as trademarks laws prevent a generic from looking exactly like the brand-name drug.
Generics are less expensive because generic manufacturers don't have to invest large sums of money to develop a drug. When the brand-name patent expires, generic companies can manufacture a copy of the brand-name and sell it at a substantial discount.
Calan medication should be taken once daily or as prescribed by your doctor. Do not crush or chew these tablets but swallow them as a whole. The dosage depends on your reaction to Calan SR treatment and the severity of your medical condition. Most people who experience high blood pressure do not feel sick and discontinue use after some time. For best results, Calan SR should be taken regularly even if you feel better. It might take a week for blood pressure patients to experience any improvement in their condition.
Calan SR should be administered with food with low initial doses of Calan SR 120mg every day for patients who have an increased reaction to verapamil for example children or the elderly. If a favorable response is not achieved with a lower dose, then it should be increased to Calan SR 240mg daily.
The active ingredient of Calan SR is Verapamil Hydrochloride.
If you are allergic to verapamil, then inform your doctor before taking this medicine. Discuss your medical history with your doctor before starting the treatment. Limit the use of alcoholic beverages while you are taking this medicine as it may make you dizzy.
Some common side effects are: