45 min is not good enough. I think 1.5 hour window will be good. Doha airport is very big and always busy. this airport is used mostly for connecting flights so huge number of passengers are there all the time. If you have 45 min only transit, you should contact ground staff so that they will able to put you without going through lines for security and provide you inner airport vehicle.

thanks Karmayogi, will do that

During my visit, I had a similar situation. I was able to just make it just fine, was a bit on the hush, but it's wise to contact the ground staff to expedite the screening. Also, I didn't get a chance to get any booze from duty-free so a bit hard decision. But I would take 45 minutes transit over 12 hours any day.

dalle_momo lol i totally forgot about booze. i guess i have to get loaded couple of bottle from here then.thanks