NIFEDIPINE (nye FED i peen) 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 high blood pressure and chest pain caused by angina.
Take this medicine by mouth with a glass of water. Follow the directions on the prescription label. Do not cut, crush or chew. Take your doses at regular intervals. Do not take your medicine more often then directed. Do not suddenly stop taking this medicine. Your doctor will tell you how much medicine to take. If your doctor wants you to stop the medicine, the dose will be slowly lowered over time to avoid any side effects.
Talk to your pediatrician regarding the use of this medicine in children. Special care may be needed.
Side effects that you should report to your doctor or health care professional as soon as possible:
blood in the urine
fast heartbeat, palpitations, irregular heartbeat, chest pain
redness, blistering, peeling or loosening of the skin, including inside the mouth
reduced amount of urine passed
swelling of the legs and ankles
Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):
weakness or tiredness
Do not take this medicine with any of the following medications:
certain medicines for seizures like carbamazepine, phenobarbital, phenytoin
St. John's Wort
This medicine may also interact with the following medications:
antiviral medicines for HIV or AIDS
certain medicines for blood pressure
certain medicines for diabetes
certain medicines for erectile dysfunction
certain medicines for fungal infections like ketoconazole, fluconazole, and itraconazole
certain medicines for irregular heart beat like flecainide and quinidine
certain medicines that treat or prevent blood clots like warfarin
local or general anesthetics
stomach acid blockers like cimetidine, ranitidine, omeprazole, or pantoprazole
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.
Keep out of the reach of children.
Store at room temperature below 30 degrees C (86 degrees F). Protect from moisture and humidity. Keep container tightly closed. Throw away any unused medicine after the expiration date.
They need to know if you have any of these conditions:
heart problems, low blood pressure, slow or irregular heartbeat
previous heart attack
stomach or intestine problems
an unusual or allergic reaction to nifedipine, other medicines, foods, dyes, or preservatives
pregnant or trying to get pregnant
Visit your doctor or health care professional for regular check ups. Check your blood pressure and pulse rate regularly. Ask your doctor or health care professional what your blood pressure and pulse rate should be and when you should contact him or her.
You may get drowsy or dizzy. Do not drive, use machinery, or do anything that needs mental alertness until you know how this medicine affects you. Do not stand or sit up quickly, especially if you are an older patient. This reduces the risk of dizzy or fainting spells. Alcohol may interfere with the effect of this medicine. Avoid alcoholic drinks.
If you are taking Procardia XL, you may notice the empty shell of the tablet in your stool.