Sustained-release: 8 or 12 mg po every 8 to 12 hours. Supplied: Extended Release Cap: 6 mg, 8 mg, 12 mg Liquid/syrup: 2 mg/5 ml Tablet: 2 mg, 4 mg.Chewable: 2 mg EExtended Release tab: 8 mg, 12 mg, 16 mg Tavist 12 Hour Allergy Tablets: Clemastine fumarate, USP 1.34 mg (equivalent to 1 mg clemastine).They are used primarily to treat disorders where abnormal or excessive histamine release by inflammatory cells is thought to underly illness.This includes conditions such as: Other conditions such as hyper-reactive (vasomotor) rhinitis and pruritus of any cause are commonly treated with antihistamines, although there is little evidence that histamine plays a contributory role.
Mechanism of Action Cyproheptadine is a serotonin and histamine antagonist with anticholinergic and sedative effects.
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[ Read the disclaimer | Adults: Allergic rhinitis, seasonal/perennial: 5 mg po qd. In patients with liver or renal impairment, a starting dose of one 5 mg tablet every other day is recommended based on pharmacokinetic data.
Mechanism of Action Desloratadine is a long-acting tricyclic histamine antagonist with selective H1-receptor histamine antagonist activity.
Receptor binding data indicate that at a concentration of 2–3 ng/m L (7 nanomolar), desloratadine shows significant interaction with the human histamine H1-receptor.