Tavist Allergy/Sinus/Headache Information

What's inside Tavist Allergy/Sinus/Headache

Tavist Allergy/Sinus/Headache Chemical Information

acetaminophen - An acetanilide with analgesic and antipyretic activity. Although the exact mechanism through which acetaminophen exert its effects has yet to be fully determined, this agent probably acts by inhibiting prostaglandin synthesis in the central nervous system (CNS). Inhibition of prostaglandin synthesis in the CNS results in elevation of the pain threshold and lowering of the thermal set point in the hypothalamus.

clemastine fumarate - A synthetic ethanolamine with anticholinergic, sedative, and histamine H1 antagonistic properties. Clemastine fumarate blocks the H1 histamine receptor and prevents the symptoms that are caused by histamine activity on capillaries, bronchial and gastrointestinal smooth muscles, including vasodilation, increased capillary permeability, bronchoconstriction, and spasmodic contraction of gastrointestinal smooth muscles. This drug also prevents histamine-induced pain and itching of mucous membranes.

pseudoephedrine hydrochloride - The hydrochloride salt form of pseudoephedrine, a phenethylamine and an diastereomer of ephedrine with sympathomimetic property. Pseudoephedrine hydrochloride displaces norepinephrine from storage vesicles in presynaptic neurones, thereby releasing norepinephrine into the neuronal synapses where it stimulates primarily alpha-adrenergic receptors. It also has weak direct agonist activity at alpha- and beta- adrenergic receptors. Receptor stimulation results in vasoconstriction and decreases nasal and sinus congestion.