I am not an expert and I am unsure on how bad do these cause permanent brain damage, but I am a junkie and can tell you while brain damage exists is not necessariliy something that will make your brain useless. I have done LSD with cocaine, cocaine with ketamine, the three together, while smoking weed and drinking booze, cheap meth pills, popper, I smoke weed almost every day and I binge drink on week ends and a lot of times during the week. Point is, it is impossible I do not have some degree of drain bamage, and while I certainly have met people who fucked themselves with drug abuse, it is a lot harder than what people think to fuck your brain. I can only expect a well prescribed, taken with moderation medicament will do better. I would contact your doctor to make sure you are fine, but I would not get depress over it. I mean, I think I can still produce some nice thoughts otherwise the up votes I get are the compassion for some deranged lunatic.