Hi, I've been diabetic for some 8 years now and have recently been put on a Disposable Insulin Pen. I am still on medication of Metformin (6x500mg a day and 2 glicazide a day). I am new to Insulin and although very nervous at first, am getting the hang of it. My readings for the last 3 years have been very high (in part due to Cancer of the womb in 2009 and a badly infected Gall Bladder which had to be removed). I had a total Hysterectomy and have been clear for three years. I had Radiotherapy (both internal and external) and apparently this may have been the cause of my fluctuating sugar levels. Since taking the Insulin (now on my 4th day) my levels have dropped considerably. I was originally on 10 units twice a day and after four days, it was increased to 12 units twice a day. I'm monitoring my levels daily and am delighted to see them back in single digits. Can anyone tell me if I have to wait 20 mins from the time I inject to the time I eat? My doctor told me to wait 20 mins what is the general consensus? Also, is alcohol totally not allowed - I forgot to ask my Doctor. I'm speaking to him again on Friday, so I'll probably get answers to my questions, but just wanted to check on here.