Clemastine is an antihistamine that reduces the effects of natural chemical histamine in the body. Histamine can produce symptoms of sneezing, itching, watery eyes, and runny nose.
Clemastine is used to treat sneezing, runny nose, watery eyes, itching, and other cold or allergy symptoms.
Clemastine is may also be used for purposes not listed in this medication guide.
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Side effects may be more likely in older adults.
Common side effects may include:
blurred vision; or
feeling restless or excited (especially in children).
Use exactly as directed on the label, or as prescribed by your doctor. Do not use in larger or smaller amounts or for longer than recommended. This medicine is usually taken only for a short time until your symptoms clear up. Clemastine can be taken with or without food. Measure liquid medicine with the dosing syringe provided, or with a special dose-measuring spoon or medicine cup. If you do not have a dose-measuring device, ask your pharmacist for one. Do not take for longer than 7 days in a row. Call your doctor if your symptoms do not improve after 7 days of treatment, or if you have a fever with a headache or skin rash. If you need surgery or medical tests, tell the surgeon or doctor ahead of time if you have taken this medicine within the past few days.