No this is not a normal hangover. Alcohol along with your medication of guanfacine
togather causes drowsiness
, dizziness, depression
, blurred vision
, etc. You are taking guanfacine for tics. Alcohol is bad in tics. Guanfacine is somtimes used for for treatment of withdrawal for opioids, alcohol, and nicotine. So stop drinking if you really want to get rid of Tics.