CroFab and Fentanyl Buccal mucosa, Oromucosal

• Generic Name: antivenin (crotalidae) polyvalent
• Dosage Forms: injection, powder, lyophilized, for solution
• Other Brand Names: Anavip, CroFab, Antivenin Polyvalent

Crotalidae antivenin is an anti-venom used to treat a person who has been bitten by a venomous snake such as a rattlesnake or Water Moccasin.

CroFab may also be used for purposes not listed in this medication guide.

• Generic Name: fentanyl
• Dosage Forms: n.a.
• Other Brand Names: Duragesic, Abstral, Fentora, Subsys, Actiq, Ionsys, Lazanda, Onsolis, Sublimaze

Fentanyl is used to treat severe pain in cancer patients. It is used for breakthrough cancer pain, which are flares of pain that “break through” after a routine pain medicine has been used. Fentanyl belongs to the group of medicines called narcotic analgesics. It is only used in patients who are already taking narcotic analgesics.

Fentanyl acts in the central nervous system (CNS) to relieve pain. Some of its side effects are also caused by actions in the CNS. When a narcotic is used for a long time, it may become habit-forming or cause mental or physical dependence. However, people who have continuous pain should not let the fear of dependence keep them from using narcotics to relieve pain. Mental dependence (addiction) is not likely to occur when narcotics are used for this purpose. Physical dependence may lead to withdrawal side effects if treatment is stopped suddenly. Withdrawal side effects can usually be prevented by gradually reducing the dose over a period of time before the medicine is stopped completely. Talk to your doctor about the benefits of fentanyl and how to prevent withdrawal side effects.

Fentanyl is available only with your doctor's prescription. The Abstral®, Actiq®, Fentora®, Onsolis®, and Subsys® products are only available under a restricted distribution program. You will have to read and sign papers that explain how the medicine is used when you pick up your prescription.