What is it. Salsalate in a double salicylate compound, like Aspirin but a differnet compound. It is not addictive so I am uncertain about the term abuse. It is an antiinflamatory and analgesic. There is a problem in some with analgesic withdrawal headaches, where when persistent analgesic usage continues for a while and in some with stopping the analgesic can cause. Abuse - need a defintion-of question.
Two. Salicylate molecules hooked together where the acetyl group was. No effect on bleeding or stomach irritation. Actually, when ingested it is inactive. The liver splits it into 2 salicylate molecules!
No. It occurs but it is not common.