Diltiazem (Oral Route)

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Side Effects

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur:

• Body aches or pain
• Congestion
• Cough
• Dryness or soreness of throat
• Fever
• Hoarseness
• Runny nose
• Tender or swollen glands in neck
• Trouble in swallowing
• Voice changes

• Chest pain or discomfort
• Chills
• Diarrhea
• Difficult or labored breathing
• Feeling faint, dizzy, or lightheaded
• Feeling of warmth or heat
• Flushing or redness of skin, especially on face and neck
• General feeling of discomfort or illness
• Headache
• Joint pain
• Loss of appetite
• Muscle aches and pains
• Nausea
• Shivering
• Shortness of breath
• Slow or irregular heartbeat
• Sore throat
• Sweating
• Swelling of hands, ankles, feet, or lower legs
• Tightness in chest
• Trouble sleeping
• Unusual tiredness or weakness
• Vomiting
• Wheezing

• Blistering, peeling, or loosening of skin
• Itching
• Large, hive-like swelling on face, eyelids, lips, tongue, throat, hands, legs, feet, or sex organs
• No heart beat
• Red irritated eyes
• Red skin lesions, often with a purple center
• Sores, ulcers, or white spots in mouth or on lips

Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

• Sneezing
• Stuffy nose

• Acid or sour stomach
• Belching
• Constipation
• Continuing ringing or buzzing or other unexplained noise in ears
• Degenerative disease of the joint
• Difficulty in moving
• Hearing loss
• Heartburn
• Indigestion
• Lack or loss of strength
• Muscle aching or cramping
• Muscle pains or stiffness
• Pain or tenderness around eyes and cheekbones
• Rash
• Sleeplessness
• Stomach discomfort, upset, or pain
• Swollen joints
• Unable to sleep

• Hair loss or thinning of hair

Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.

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