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Trade names | Dipect, Lenopect, Selvignon, Selvigon, Theratuss, Toraxan |
Other names | Pipazethate; D-254; LG-254; SKF-70230A; SQ-15874 |
AHFS/Drugs.com | International Drug Names |
Routes of administration | oral |
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ECHA InfoCard | 100.016.826 |
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Formula | C21H25N3O3S |
Molar mass | 399.51 g·mol−1 |
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Pipazetate (INN ) (brand names Dipect, Lenopect, Selvigon, Theratuss, Toraxan), or pipazethate (USAN ), is a 1-azaphenothiazine drug that was briefly marketed as a cough suppressant.[1][2] It binds to the sigma-1 receptor with an IC50 value of 190 nM.[3] It also has local anesthetic action, and in large doses can produce seizures.[4]
As the brand name Theratuss, it was approved by the FDA in 1962, on evidence of safety only. It was withdrawn from the US market in 1972 when the manufacturer, Bristol Myers Squibb, failed to produce evidence of efficacy.[5] Clinical studies showed that it did not decrease cough frequency at recommended dosages.[6]
Infrequent side effects include nausea, vomiting, drowsiness, fatigue, rash, tachycardia and seizures.[6]