Article: Ketotifen

Ketotifen
Systematic (IUPAC) name
4,9-dihydro-4-(1-methyl-4-piperidinylidene)- 10H-benzocyclohepta[1,2-b]thiopen-10-one
Identifiers
CAS number	34580-14-8
ATC code	R06AX17 S01GX08
PubChem	3827
DrugBank	APRD01061
Chemical data
Formula	C19H19NOS
Mol. weight	309.426 g/mol
Pharmacokinetic data
Bioavailability	60%
Protein binding	75%
Metabolism	Hepatic
Half life	21 Hours
Excretion	?
Therapeutic considerations
Pregnancy cat.	?
Legal status
Routes	Oral

Ketotifen fumarate (sold under the brand name Zaditor) is an H₁-antihistamine available in two forms. In its ophthalmic form, it is used to treat allergic conjunctivitis, or the itchy red eyes caused by allergies. In its oral form, it is used to prevent asthma attacks. Side effects include drowsiness, weight gain, dry mouth, irritability, and increased nosebleeds.