...  by Rachael: What are the cause and effects of prescription drug abuse? I am writing a causal paper and i need some causes and effects of prescription drug abuse. thanks Best answer: Answer by JenniferHi…..well there are,of course many causes for drug abuse/addiction,and there are times when there is no direct cause for abuse/addiction.But for the most part…..addiction can be caused from traumatic abuse/childhoods,PTSD,even a horrific car accident can trigger addiction.A horrific car accident can be the very beginning of addiction for many people…even a minor tooth extraction can be the cause of addiction for ...