A police officer discovered 32 wraps of suspected heroin and crack after stopping a car in Accrington yesterday.
The officer stopped the silver Fiat Punto on Tanpits Road and found the drugs with an estimated street value of £320.
A 24-year-old man was arrested on suspicion of possession with intent to supply heroin and crack and was released from police custody pending further forensic enquiries.
DI Simon Upton said: "Once again, we have taken suspected heroin and crack off our streets. We are committed to tacking drugs and we will continue to take action against those believed to be involved in supplying them."
Anyone with information can contact police on 0845 1 25 35 45 or Crimestoppers anonymously on 0800 555 111.