If i smoke marijuana often, does it increase creatine kinase in my blood?

Pot an CPK: I am not aware of thc increasing ck blood levels. It's a muscle enzyme and the most common reason for increases is exercise, weight lifting, etc. The most serious cause is a heart attack.

Uncertain: Elevated CK is indicative of injury to muscle, including heart muscle. Your muscle may or may not be affected by MJ, but your brain is being stoned. So quit using it while you are ahead.