Amidopyrine is metabolized by demethylation and acetylation. Amidopirina metabolites are 4-aminoantipyrine, metilaminoantipirin, rubazonovaya and metilrubazonovaya acid. These acids have a reddish color. Due to the presence in the urine of these acids makers amidopirina high doses, it can have a reddish brownish coloration.
Aminophenazone
Mycophenolic acid
Ciclosporin
Tibolone
Azathioprine
Cyclophosphamide
Cephalosporin
Prednisolone