Do cranberry pills and water cleanse your system in a week of THC?

Not really. It depends on different things like body structure, metabolism, physical activities etc. Also are you a heavy smoker or not. THC the active ingredient in marihuana is fat - soluble, that means THC is stored in the fat sell. Single use it stays 2-3 days in your urine, in habitual use -up to 12 weeks.

If you smoke little amount and you are not constant smoker, probably for one week you will be ok. Stay well hydrated; eat more red meat take vitamin b-12 daily. My advice is to buy a single panel THC kit and home test yourself. If it is really important for you to pass go google drugtestfriend, there is a free phone consultant who will help you a lot with good tips for passing.