db186a7d_etriosis_org__The_Global_Forum__Dosage
[Generic name] Triptorelin [Brand name] Decapeptyl SR [Form] Monthly and three-monthly injection [Dosage] 
Triptorelin comes as an injection that is injected under the skin or into the buttock muscle once a month or once every three months.
GnRH « Endometriosis.org: The Global Forum
Dosage