N-Methyl is an intermediate in the production of anti-worm agent and pharmaceuticals like antibiotics, tranquilizers and anti-histamines. PIP, N-MePIP, N-EtPIP, HEP are used in the manufacturing of a great variety of drugs such as Floxacins and Quinolones (anti-bacterials and antibiotics) and Phenothiazines (anti-psychotics). Last but not least PIP is an essential component of Viagra, while N-Amino-N'-Methylpiperazine is used for the production of Rifampicin (anti-tuberculosis).