A centrally acting skeletal muscle relaxant whose mechanism of action is not completely understood but may be related to its sedative actions. Carisoprodol is indicated for the relief of discomfort associated with acute, painful musculoskeletal conditions in adults. Most common adverse reactions (incidence > 2%) are drowsiness, dizziness, and headache. Carisoprodol might be mixtured with Aspirin and Codeine Phosphate. Studies indicating increased risk of abuse or addiction led to withdrawal of the drug from the market in Norway and other EU countries in 2008.

Meprobamate is a carbamate derivative used as an anxiolytic drug. Meprobamate enhances GABA-A currents, and at higher concentration, exhibits a separate channel-blocking effect that limits the magnitude of GABA(A) receptor potentiation. It is also a potent adenosine reuptake inhibitor (AdoRI), which is most likely responsible for its lesser degree of sedation compared to barbiturates. Meprobamate was withdrawn from European and Canadian markets due to its potential to cause physical and psychological dependence.

Chlorphenesin carbamate (Maolate, Musil) is a centrally acting muscle relaxant used to treat muscle pain and spasms. Сhlorphenesin acts in the central nervous system (CNS) rather than directly on skeletal muscle. It also has antifungal and some antibacterial properties. The major adverse effects are drowsiness and dizziness.

Chlorphenesin is a preservative and cosmetic biocide that helps prevent the growth of microorganisms. In cosmetics and personal care products, Chlorphenesin is used in the formulation of aftershave lotions, bath products, cleansing products, deodorants, hair conditioners, makeup, skin care products, personal cleanliness products, and shampoos. Chlorphenesin has been reported to cause irritation and contact dermatitis in some people, particularly those with sensitive and dry skin. The Cosmetic Ingredient Review (CIR) expert panel released a safety assessment in October 2012, however, that stated chlorphenesin at 0.3 percent (as it exists in personal care products) was classified as having “negligible dermal irritation potential.”