Clemastine is an over-the-counter (OTC) antihistamine medication commonly known by the brand name “Tavist”, which is available in syrup and tablet form. The antihistamine Clemastine is used for the treatment and relief of allergic, hay-fever and common cold symptoms which include sneezing, runny nose, and red/itchy/irritated eyes. As an antihistamine, Clemastine works by blocking the action of histamine, a substance found in the body which causes allergic symptoms (such as fits of sneezing, watery or runny nasal passages, and irritation of the eyes). The Clemastine antihistamine also blocks another natural substance made by your body known as acetylcholine, and therefore helps dry certain body fluids in order to relieve symptoms such as watery eyes and runny nasal passages. While Clemastine can help control the symptoms of common colds, the antihistamine itself does not treat actual viral infectious disease of the respiratory system (usually caused by the rhinovirus and coronavirus, respectively), nor will it speed the recovery of the host. In addition to basic uses of the antihistamine, prescription strength Clemastine may also be used to relieve the itching and swelling of hives.
When taking Clemastine as an over-the-counter antihistamine medication, make sure to read any and all directions printed on or packaged with the product before administering this medication. If questions arise, consult your pharmacist immediately. If prescribed this antihistamine by your doctor, take Clemastine only as directed and for the purposes discussed with your doctor. Both tablet and liquid versions of this antihistamine may be taken with or without food, though you may opt to take the antihistamine medication with food or milk if upset stomach occurs. Liquid doses should be measured precisely before administering; opt for use of medication-measuring devices to carefully measure the exact prescribed dose. You should never rely on a household spoon as they vary in size and may have negative side effects due to under, over, or generally inappropriate dosing. Dosage will be determined by your physician based on your age and your specific medical condition and medical history. Please follow the specified dosage, and never increase your dose or take this medication more often than recommended by your doctor or the package instructions without your doctor's specific and expressed approval.
As with other antihistamine medication, and all medication in general, you should only use as directed. In the rare case that the patient becomes unconscious, suffers a seizure or suffers loss of breath, immediately call Emergency Services at 911. Side effects of this antihistamine include blurred vision, clumsiness, constipation, dizziness, drowsiness, drying of the mouth/nose/throat, headache, trouble walking, and upset stomach. These are common side effects for this antihistamine and may decrease while your body adjusts to the antihistamine medication. If side effects worsen instead of going away, contact your doctor or pharmacist as soon as possible. This antihistamine may also dry up or thicken mucus within your lungs, creating difficulty breathing and expelling the mucus, a side effect which can be easily prevented with consuming plenty of water and liquids.