Antispasmodics are medications that are used to relieve or prevent muscle spasms in the body. There are several synonyms for antispasmodics, including muscle relaxants, spasmolytics, anticholinergics, and antimuscarinics. Muscle relaxants work by reducing muscle function and relieving pain, while spasmolytics work by blocking the release of signals that cause muscle spasms. Anticholinergics and antimuscarinics work by blocking the action of acetylcholine, a neurotransmitter that plays a role in muscle contraction. Other terms that may be used include antispasmodic agents or drugs, smooth muscle relaxants, and neuromuscular blocking agents. Regardless of the terminology used, these medications are important tools in the treatment and management of conditions that cause muscle spasms.