Can Cosamin®DS be taken by patients allergic to sulfa drugs?
There is no cross-reactivity between sulfa drugs and Cosamin®DS. Sulfa drugs are characterised by having a benzene ring and a sulfanilamide group as part of their molecular structure. People who are allergic to sulfa drugs are probably reacting to their characteristic molecular structure. The compounds in Cosamin®DS do not have similar molecular structures. An allergy to sulfa drugs should not be interpreted as an allergy to sulfur. Sulfur is an essential element that is present in many foods and occurs in every cell in the body.
