RECTOGESIC is a topical ointment primarily used for the treatment of anal fissures, which are small tears in the skin around the anus leading to pain and bleeding during bowel movements. The active ingredient in RECTOGESIC is glyceryl trinitrate (also known as nitroglycerin), which works by relaxing the smooth muscles in the blood vessels, thereby increasing blood flow to the affected area. This enhanced blood flow helps in healing the fissures and also reduces the pain associated with this condition. RECTOGESIC is applied directly to the affected area around the anus, and its use should be strictly according to the directions provided by a healthcare professional to avoid potential side effects.