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Clemastine Brand names, Clemastine Analogs

Clemastine Brand Names Mixture

  • Xalacom (Latanoprost + Timolol Maleate)

Clemastine Chemical_Formula


Clemastine RX_link

Clemastine fda sheet

Clemastine msds (material safety sheet)

Clemastine MSDS

Clemastine Synthesis Reference

No information avaliable

Clemastine Molecular Weight

343.89 g/mol

Clemastine Melting Point

178 oC (hydrogen fumarate formulation)

Clemastine H2O Solubility

Soluble (hydrogen fumarate formulation)

Clemastine State


Clemastine LogP


Clemastine Dosage Forms

Syrup (0.5 mg drug per 5mL syrup) and tablet (oral, 1mg)

Clemastine Indication

For the relief of symptoms associated with allergic rhinitis such as sneezing, rhinorrhea, pruritus and acrimation.

Clemastine Pharmacology

Clemastine is an antihistamine with anticholinergic (drying) and sedative side effects. Antihistamines competitively antagonize various physiological effects of histamine including increased capillary permeability and dilatation, the formation of edema, the "flare" and "itch" response, and gastrointestinal and respiratory smooth muscle constriction. Within the vascular tree, H1- receptor antagonists inhibit both the vasoconstrictor and vasodilator effects of histamine. Depending on the dose, H1- receptor antagonists can produce CNS stimulation or depression. Most antihistamines exhibit central and/or peripheral anticholinergic activity. Antihistamines act by competitively blocking H1- receptor sites. Antihistamines do not pharmacologically antagonize or chemically inactivate histamine, nor do they prevent the release of histamine.

Clemastine Absorption

Rapidly absorbed from the gastrointestinal tract.

Clemastine side effects and Toxicity

Oral LD50 in rat and mouse is 3550 mg/kg and 730 mg/kg, respectively. Antihistamine overdosage reactions may vary from central nervous system depression to stimulation. In children, stimulation predominates initially in a syndrome which may include excitement, hallucinations, ataxia, incoordination, muscle twitching, athetosis, hyperthermia, cyanosis convulsions, tremors, and hyperreflexia followed by postictal depression and cardio-respiratory arrest. Convulsions in children may be preceded by mild depression. Dry mouth, fixed dilated pupils, flushing of the face, and fever are common. In adults, CNS depression, ranging from drowsiness to coma, is more common.

Clemastine Patient Information

No information avaliable

Clemastine Organisms Affected

Humans and other mammals