Help me ID this early 80's movie

[bkasten]

I only remember one scene from this movie about a roving group of heroes: one of the group's less useful members steals a bottle of some "special medicine" from the main bad guy, and then swallows it when persued. The bad guy catches him and hits him in the stomach which releases the medecine and kills him. I think the bad guy was Lo Lieh. Not much of a description, but I have been curious to see who the actors are in this movie....