List of products in the National Drug Code with proprietary name acular. This medication is used to temporarily relieve itching eyes caused by seasonal allergies. It is also used to prevent and treat eye swelling due to a certain type of eye surgery (cataract removal). Ketorolac belongs to a class of drugs known as nonsteroidal anti-inflammatory drugs (NSAIDs). It works by blocking certain natural substances in your body to reduce pain and swelling.