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.