Drotaverine and Aceclofenac, which relieves abdominal pain and cramps. Drotaverine is an anti-spasmodic medicine which relieves contractions (spasms) associated with smooth muscles in the abdomen. Aceclofenac is a non-steroidal anti-inflammatory drug (NSAID). It works by blocking the release of certain chemical messengers that cause abdominal pain and inflammation (swelling).