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DILTIAZEM (dil TYE a zem) 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 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 this medicine. This medicine is usually taken before meals and at bedtime. Take your doses at regular intervals. Do not take your medicine more often then directed. Do not stop taking except on the advice of your doctor or health care professional.
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:
allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue
confusion, mental depression
feeling faint or lightheaded, falls
pinpoint red spots on the skin
redness, blistering, peeling or loosening of the skin, including inside the mouth
slow, irregular heartbeat
swelling of the ankles, feet
unusual bleeding or bruising
Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):
change in sex drive or performance
constipation or diarrhea
flushing of the face
tired or weak
Do not take this medicine with any of the following:
red yeast rice
This medicine may also interact with the following medications:
local anesthetics or general anesthetics
medicines for anxiety or difficulty sleeping like midazolam and triazolam
medicines for high blood pressure or heart problems
rifampin, rifabutin, or rifapentine
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 between 20 and 25 degrees C (68 and 77 degrees F). Protect from light. 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, irregular heartbeat
previous heart attack
an unusual or allergic reaction to diltiazem, other medicines, foods, dyes, or preservatives
pregnant or trying to get pregnant
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 feel dizzy or lightheaded. Do not drive, use machinery, or do anything that needs mental alertness until you know how this medicine affects you. To reduce the risk of dizzy or fainting spells, do not sit or stand up quickly, especially if you are an older patient. Alcohol can make you more dizzy or increase flushing and rapid heartbeats. Avoid alcoholic drinks.
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