Pregnancy & Lactation: Risk data not available
What is Isoptin SR?
Verapamil is used in adults to treat hypertension (high blood pressure), angina (chest pain), and certain heart rhythm disorders. oral
Verapamil is used in adults and children to rapidly or temporarily restore normal heart rate in people with certain heart rhythm disorders. injection
Lowering blood pressure may lower your risk of a stroke or heart attack.
Verapamil may also be used for purposes not listed in this medication guide.
Warnings
You should not use verapamil if you are allergic to it, or if you have:
It is not known if verapamil will harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant.
Do not breastfeed.
- "sick sinus syndrome" or "AV block" (unless you have a pacemaker);
- very low blood pressure; or
- if your heart cannot pump blood properly.
- severe congestive heart failure;
- certain heart rhythm disorders (such as 'Afib' or atrial flutter with Wolff-Parkinson-White syndrome or Lown-Ganong-Levine syndrome);
- a heart condition that causes you to have very rapid heartbeats; or
- if you are receiving an intravenous beta-blocker (such as atenolol, metoprolol, or propranolol).
- low blood pressure;
- abnormal thickening of the heart muscle;
- certain types of brain tumors;
- congestive heart failure;
- a nerve-muscle disorder such as myasthenia gravis or muscular dystrophy; or
- kidney or liver disease.
You may not be able to use verapamil if you have:
Tell your doctor if you have ever had:
How should I use Isoptin SR
Use Isoptin SR (Oral) exactly as directed on the label, or as prescribed by your doctor. Do not use in larger or smaller amounts or for longer than recommended.
Follow all directions on your prescription label and read all medication guides or instruction sheets. Your doctor may occasionally change your dose. Use the medicine exactly as directed.
Verapamil is taken by mouth. Your pharmacist can provide more information about how to take this medicine. oral
Your dose needs may change if you switch to a different brand, strength, or form of this medicine.
Your blood pressure and liver function will need to be checked often.
If you have high blood pressure, High blood pressure often has no symptoms. keep using this medicine even if you feel well.
Verapamil is given into a vein by a healthcare provider. Your heart rate will be constantly monitored using an electrocardiogram or ECG (sometimes called an EKG). Your blood pressure and other vital signs will also be watched closely. injection
Some forms of verapamil cannot be crushed or chewed, and some forms can be opened and mixed with applesauce. Ask your pharmacist how to take this medicine. oral
Store at room temperature away from moisture, heat, and light.
Verapamil is used when needed and does not have a daily dose. Call your doctor if the medicine is not effective. injection
Take verapamil as soon as you can, but skip the missed dose if it is almost time for your next dose. use two doses at one time. oralDo not
Isoptin SR side effects
Get emergency medical help if you have hives; difficult breathing; swelling of your face, lips, tongue, or throat. signs of an allergic reaction:
Call your doctor at once if you have:
- chest pain, fast, slow, or uneven heart rate;
- a light-headed feeling, like you might pass out;
- heart problems--swelling, rapid weight gain, feeling short of breath;
- liver problems--loss of appetite, stomach pain (upper right side), tiredness, itching, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes); or
- fluid build-up in or around the lungs--pain when you breathe, feeling short of breath while lying down, wheezing, gasping for breath, cough with foamy mucus, cold, clammy skin, anxiety, rapid heartbeats.
- nausea, constipation;
- infections, flu symptoms;
- swelling in lower legs or hands;
- headache, dizziness; or
- low blood pressure.
Common side effects may include:
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
What other drugs will affect Isoptin SR?
Avoid getting up too fast from a sitting or lying position, or you may feel dizzy. Avoid driving or hazardous activity until you know how this medicine will affect you. Your reactions could be impaired.
Drinking alcohol with this medicine can cause side effects.
Grapefruit may interact with verapamil and cause side effects. Avoid consuming grapefruit products.