Hydase Injection and Rectiv topical

• Generic Name: hyaluronidase
• Dosage Forms: injection, solution
• Other Brand Names: Amphadase, Hylenex, Vitrase, Wydase, Hydase

Hyaluronidase is a natural substance found in the body, which is collected from either cows or pigs. It is cleaned up to remove animal substances. It may also be produced in a laboratory that recreates it from human albumin sources.

Hyaluronidase injection is a spreading substance. It is used with other medicines given under the skin to improve their uptake by the body. This method of drug delivery is only used when the drug cannot be given by injection into a vein. Hyaluronidase injection is also used to increase absorption of fluids or medicines that are injected into your skin. It also used to help improve absorption of radioactive substances during a procedure called subcutaneous urography.

This medicine is to be given only by or under the direct supervision of a doctor.

• Generic Name: nitroglycerin
• Dosage Forms: rectal ointment
• Other Brand Names: Rectiv, Gonitro, Nitrolingual, NitroMist, Nitrostat, Nitro-Time, Gonitro, Minitran, Nitro TD Patch-A, Nitro-Dur, Nitro-Bid, Nitrol Appli-Kit

Intra-anal treatment of moderate to severe pain associated with chronic anal fissure.

Chronic anal fissure is thought to be related to sustained high resting anal sphincter tone and associated anodermal ischemia. Lateral internal sphincterotomy generally has been used to treat anal fissures that do not respond to conservative therapy (e.g., sitz baths, increased dietary fiber); however, minor incontinence, which may be persistent, may develop after surgery. Botulinum toxin type A injections or topical therapy with nitrates (e.g., nitroglycerin rectal ointment) or calcium-channel blocking agents (e.g., diltiazem gel, not commercially available in US) has been used to reduce anal sphincter tone and circumvent potential complications of surgery.