What can i do if my friend is worried she has taken too much cocaine. any advice?

Time for Treatment: Once you are involved with cocaine, it usually is not a question of how much but rather how to completely stop it. Usually this will involved a drug treatment program inpatient or outpatient. Some form of the treatment program usually will continue long term. I agree also with dr.Minich that if there is any concern about overdose 911 should be called immediately.