KPRC is reporting a lawsuit has been filed Monday claiming that 15 gas stations in the Houston area are selling “male enhancement” pills that contain undisclosed drugs including Viagra.

The suit filed in Houston federal court accuses the companies that own the gas stations of selling pills that are billed as sexual enhancement supplements, which lab tests have found actually contain drugs such as sildenafil, desmethyl carbodenafil, dapoxetine and tadalafil.