SIDE EFFECTS: Constipation, drowsiness, vision changes or dry mouth may occur. If any of these effects persist or worsen, notify your doctor. Unlikely to occur, but report promptly: restlessness, muscle stiffness, weakness, difficulty speaking, loss of balance, mask- like facial expression, trembling or shaking, dizziness, lip smacking or other uncontrollable movements, difficulty urinating, skin rash/discoloration. Very unlikely to occur, but report promptly: sore throat, unusual bleeding or bruising, stomach pain, yellowing of eyes or skin, dark urine, hot dry skin, vomiting. Though very unlikely to occur, notify your doctor immediately if you experience any of the following effects: severe muscle stiffness, confusion, fever, seizures, irregular/fast heartbeat, increased sweating, prolonged/painful erection. In the unlikely event you have an allergic reaction to this drug, seek immediate medical attention. Symptoms of an allergic reaction include: rash, itching, swelling, dizziness, trouble breathing. If you notice other effects not listed above, contact your doctor or pharmacist.
PRECAUTIONS: Tell your doctor your medical history, especially of: kidney or liver disease, heart disease, blood or blood vessel disease, brain disorders, other psychiatric disorders, Parkinson's disease, pheochromocytoma, seizure disorder, glaucoma, any allergies. Because this medication may cause drowsiness, use caution operating machinery or engaging in activities requiring alertness. It is recommended to avoid consumption of alcohol while taking this medication. This medication may make you more sensitive to the sun. Avoid prolonged sun exposure. Wear protective clothing and use a sunscreen when outdoors. This medication can reduce sweating making you more susceptible to heat stroke. Avoid strenuous work or exercise in hot weather. This medication should be used only when clearly needed during pregnancy. Discuss the risks and benefits with your doctor. This medication may be excreted into breast milk and may have undesirable effects on a nursing infant. Consult your doctor before breast-feeding.
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
Need help identifying pills and medications?
Back to Medications Index
- Allergic Skin Disorders
- Bacterial Skin Diseases
- Bites and Infestations
- Diseases of Pigment
- Fungal Skin Diseases
- Medical Anatomy and Illustrations
- Noncancerous, Precancerous & Cancerous Tumors
- Oral Health Conditions
- Papules, Scales, Plaques and Eruptions
- Scalp, Hair and Nails
- Sexually Transmitted Diseases (STDs)
- Vascular, Lymphatic and Systemic Conditions
- Viral Skin Diseases
- Additional Skin Conditions