Trimix is an injectable

Injection (medicine)

An injection is an infusion method of putting fluid into the body, usually with a hollow needle and a syringe which is pierced through the skin to a sufficient depth for the material to be forced into the body...

 three-drug cocktail used to treat erectile dysfunction

Erectile dysfunction

Erectile dysfunction is sexual dysfunction characterized by the inability to develop or maintain an erection of the penis during sexual performance....

. The active ingredients in the mixture are usually alprostadil

Alprostadil

Prostaglandin E1 , known pharmaceutically as alprostadil, is a prostaglandin. It is a drug used in the treatment of erectile dysfunction and has vasodilatory properties.-Sexual dysfunction:...

, papaverine

Papaverine

Papaverine is an opium alkaloid antispasmodic drug, used primarily in the treatment of visceral spasm, vasospasm , and occasionally in the treatment of erectile dysfunction...

, and phentolamine

Phentolamine

Phentolamine is a reversible nonselective alpha-adrenergic antagonist. -Mechanism:Its primary action is vasodilation due to α1 blockade....

. The injection must be compounded by a pharmacy

Pharmacy

Pharmacy is the health profession that links the health sciences with the chemical sciences and it is charged with ensuring the safe and effective use of pharmaceutical drugs...

 and administered via intracavernosal injection

Intracavernosal injection

An intracavernous injection is an injection into the base of the penis. This injection site is often used to administer medications to check for or treat erectile dysfunction in adult men .-References:...

. Trimix is typically compounded by a pharmacy in a sterile environment and then frozen. The compound is stable for up to 6 months while stored frozen and for 1 month if stored refrigerated beginning at the time of manufacture.