Do not take this medicine with any of the following medications:

-certain medicines for seizures like carbamazepine, phenobarbital, phenytoin
-lumacaftor; ivacaftor
-rifabutin
-rifampin
-rifapentine
-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
-clarithromycin
-digoxin
-dolasetron
-erythromycin
-fluoxetine
-grapefruit juice
-local or general anesthetics
-nefazodone
-orlistat
-quinupristin; dalfopristin
-sirolimus
-stomach acid blockers like cimetidine, ranitidine, omeprazole, or pantoprazole
-tacrolimus
-valproic acid

They need to know if you have any of these conditions:

-blockage in your bowels
-constipation
-heart attack
-heart disease
-heart failure
-liver disease
-low blood pressure
-an unusual or allergic reaction to nifedipine, other drugs, foods, dyes or preservatives
-pregnant or trying to get pregnant
-breast-feeding

Visit your health care provider for regular checks on your progress. Check your blood pressure as directed. Ask your health care provider what your blood pressure should be. Also, find out when you should contact him or her.
Do not treat yourself for coughs, colds, or pain while you are using this drug without asking your health care provider for advice. Some drugs may increase your blood pressure.
You may get drowsy or dizzy. Do not drive, use machinery, or do anything that needs mental alertness until you know how this drug affects you. Do not stand up or sit up quickly, especially if you are an older patient. This reduces the risk of dizzy or fainting spells.
The tablet shell for some brands of this drug does not dissolve. This is normal. The tablet shell may appear whole in the stool. This is not a cause for concern.

Keep out of the reach of children and pets.
Store at room temperature between 20 and 25 degrees C (68 and 77 degrees F). Protect from light and moisture. Keep the container tightly closed. Throw away any unused drug after the expiration date.