Find & Manage Your Patient Assistance Programs
Estimated patient savings $600,000,000.00


Treats hay fever symptoms such as runny nose, watery eyes, and hives. This medicine is an antihistamine.

Brand Names

Good Sense Dayhist Allergy

When You Should Not Take The Medication

You should not use this medicine if you have ever had an unusual or allergic reaction to clemastine or any other antihistamine medicines. This medicine should not be taken if you are breastfeeding, or have a lung disorder such as asthma. Clemastine should not be taken with monoamine oxidase (MAO) inhibitors such as Nardil®, Parnate®, or Marplan®.

How To Store And Dispose Of This Medicine

Keep your medicine at room temperature, away from heat, direct light, and moisture. Do not freeze the oral liquid.

Keep all medicine away from children.

Possible Side Effects While Using This Medicine

Call your doctor right away if you notice any of these side effects:
Severe drowsiness
Facial flushing
Trouble breathing

If you notice these less serious side effects, talk with your doctor:
Dry mouth or throat
Thickening of mucus
Stomach upset
Urinating often

If you notice other side effects that you think are caused by this medicine, tell your doctor.