What special precautions should I follow?
Before taking Clemastine:
Tell your doctor if you are taking any of the following medications: anxiety or sleep medicines such as alprazolam (Xanax®), diazepam (Valium®), chlordiazepoxide (Librium®), temazepam (Restoril®), or triazolam (Halcion®); medications for depression such as amitriptyline (Elavil®), doxepin (Sinequan®), nortriptyline (Pamelor®), fluoxetine (Prozac®), sertraline (Zoloft®), or paroxetine (Paxil®); or any other medications that make you feel drowsy, sleepy, or relaxed.
Do not take clemastine if you have taken a monoamine oxidase inhibitor (MAOI) such as isocarboxazid (Marplan®), phenelzine (Nardil®), or tranylcypromine (Parnate®) in the last 14 days. A very dangerous drug interaction could occur, leading to serious side effects.
Also, talk to your pharmacist before taking other over-the-counter cough, cold, allergy, or insomnia medications. These may contain medicines similar to clemastine, which could lead to an overdose of antihistamine.
Moreover, inform your doctor if you have glaucoma or increased pressure in the eye, a stomach ulcer, an enlarged prostate, bladder problems, or difficulty urinating, an overactive thyroid (hyperthyroidism), hypertension or any type of heart problems, or asthma. You may not be able to take clemastine, or you may require a lower dose or special monitoring during treatment if you have any of the conditions listed above.
Clemastine is in the FDA pregnancy category B. This means that it is unlikely to harm an unborn baby. Do not take clemastine without first talking to your doctor if you are pregnant.
Additionally, clemastine passes into breast milk. Infants are especially sensitive to the effects of antihistamines, and serious side effects could occur in a nursing baby. Do not take clemastine without first talking to your doctor if you are nursing a baby.
If you are over 60 years of age, you may be more likely to experience side effects from clemastine. You may require a lower dose of this medication.
Why is this medication prescribed?
Dosage and using this medicine
What should I do if I forget a dose?
What side effects can this medication cause?