No. There is no established safe level of penicillin residue in non-penicillin drug products (see FDA guidance for industry, referenced below). The CGMP regulations in 21 CFR 211.42(d) and 211.46(d) require that penicillin-manufacturing facilities and air-handling systems must be adequately separated those used to manufacture other drugs. 21 CFR 211.176 states that a non-penicillin drug product must not be marketed if penicillin is found when tested according to the codified procedure. Alternative validated test methods to detect penicillin residues may be used if demonstrated to be equivalent to or better than the referenced method.