Brand Name
Isoptin SR
Common Name
verapamil
In this drug factsheet:
DIN (Drug Identification Number)| 01907123 | ISOPTIN SR 120MG TABLET |
| 01934317 | ISOPTIN SR 180MG TABLET |
| 00742554 | ISOPTIN SR 240MG TABLET |
How does this medication work? What will it do for me?
Verapamil belongs to the class of medications called calcium channel blockers.
It is used for the treatment of high
blood pressure, certain abnormal
heart rhythms, and angina
(chest pain). It works to control blood pressure and reduce the number of
angina attacks by relaxing blood vessels. It also normalizes heart rhythms.
Your doctor may have suggested this medication for conditions other than the
ones listed in these drug information articles. If you have not discussed this
with your doctor or are not sure why you are taking this medication, speak to
your doctor. Do not stop taking this medication without consulting your doctor.
How should I use this medication?
If you use the immediate-release tablets, the recommended dose of verapamil ranges from 80 mg to 120 mg three or four times daily with food. If you use the sustained-release (SR) tablets, the recommended dose of verapamil ranges from 180 mg to 480 mg daily with food. The SR tablets are to be taken once daily if the dose is 240 mg or less. Doses over 240 mg daily of the SR tablets should be taken in two divided doses (morning and evening) with food. Do not chew or crush the sustained-release tablets. Do not exceed a maximum dose of 480 mg daily.
Many things can affect the dose of medication that a person needs, such as body weight, other medical conditions, and other medications. If your doctor has recommended a dose different from the ones listed here, do not change the way that you are taking the medication without consulting your doctor.
It is important to take this medication regularly, exactly as prescribed by the doctor. If you miss a dose, take it as soon as possible and continue on with your regular schedule. If it is almost time for your next dose, skip the missed dose and continue on with your regular dosing schedule. Do not take a double dose to make up for a missed one.
This medication is available under multiple brand names and in several different forms. Any specific brand name of this medication may not be available in all of the forms listed here. The forms available for the specific brand you have searched are listed under "What form(s) does this medication come in?"
Do not dispose of medications in wastewater (e.g. down the sink or in the toilet) or in household garbage. Ask your pharmacist how to dispose of medications that are no longer needed or have expired.
What form(s) does this medication come in?
120 mg
Each off-white, biconvex, round, film-coated tablet, with "SR 120" embossed on one side, "KNOLL" on the other side, contains verapamil HCl 120 mg. Nonmedicinal ingredients: hydroxypropyl methylcellulose, magnesium stearate, microcrystalline cellulose, polyethylene glycol, povidone, sodium alginate, talc, titanium dioxide and wax.
180 mg
Each light-pink, football-shaped, film-coated tablet with "KNOLL" on one side and "SR", scored, "180" on the other, contains verapamil HCl 180 mg. Nonmedicinal ingredients: hydroxypropyl methylcellulose, magnesium stearate, microcrystalline cellulose, polyethylene glycol, povidone, red iron oxide (hydrated ferric oxide), sodium alginate, talc, titanium dioxide and wax.
240 mg
Each light-green, scored, capsule-shaped, film-coated tablet, with 2 triangles embossed on one side, contains verapamil HCl 240 mg. Nonmedicinal ingredients: hydroxypropyl methylcellulose, indigotine lake, magnesium stearate, microcrystalline cellulose, polyethylene glycol, povidone, quinoline yellow lake, sodium alginate, talc, titanium dioxide and wax.
Some medications may have other generic brands available. Always ask your doctor or pharmacist about the safety of switching between brands of the same medication.
Who should NOT take this medication?
Verapamil should not be used by anyone who:
- is suffering from certain types of complicated heart
attack
- is suffering from severe congestive heart
failure and/or severe left ventricular dysfunction unless it is due to
a cause that is treatable by verapamil
- has severe low blood pressure
- is in severe cardiogenic shock
- has second- or third-degree heart block
or sick sinus syndrome
- is allergic to verapamil or any of the ingredients of the medication
- has a very low heart rate
- has atrial flutter or atrial fibrillation and an accessory bypass tract
(e.g., Wolff-Parkinson-White, Lown-Ganong-Levine syndromes)
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