Cameron Farley, from Preston, has been wanted in connection with drugs offences since March 9.
The 20-year-old is also wanted for failing to appear at court charged with possession of a knife.
"If you see him, or know where he is, we would urge you not to approach him,” a spokesman for Lancashire Police said.
Farley is described as white, 5ft 2ins tall, of proportionate build, with brown eyes and short, dark brown hair.
He was last seen wearing a dark blue zipped top with a light blue logo and dark blue tracksuit bottoms.
Officers said he may also be in possession of a black bike.
Farley has links to the Broadgate, Bamber Bridge and Penwortham areas of Preston and has recently been in the Lancaster area.
Anyone with information was urged to contact the police by emailing [email protected] or calling 01772 209 940.