How Long Does 100mg Of Tramadol Hydrochloride Last In My

How long does 100mg of tramadol hydrochloride last in my body, I took one at 12:30 for back pain, I had a MRI on his morning waiting for results, however off to a wedding and I want to drink alcohol (wish I didn't take it now and am worried). I have a great heat pack on and feeling better. Please tell me I can have a little alcohol as I am the bridesmaid

Linda Brenner