So I have been on vivitrol for 18 days now. I've been starting to get like withdraw feelings like sweating, runny nose, sleep is messed up. I was curious if anyone else felt this way on the shot after a while and if it may mean my shot is wearing off? I plan on using when it's like day 21 or more but of course don't want to waste it. I have used crack during this shot and love that through out the day one of the shot. It's normally when I wake up I have the w/d symptoms as well like waking up sweaty and feeling of a cold, goosebumps etc. head ache later in the day. Thank you and also will post when I try my shot on day 21 and later.