Hi doctor :) i took phentermine 15mg for the first time today. how long does it stay on my system? i'm having a drug test in 3 days. thanks

Phentermine: Usually amphetamines clear the system in 72 hours. Phentermine which has a similar composition to amphetamines should be gone from your system in 4 days. But this is an average and does not account for individual outliers.

Phetermine and drug: If you are prescribed this - no worries - take the prescription bottle with you to the drug test. If not - you will throw a false + on the amphetamine urine test for up to 72 hours. For employment purposes they test for the big 5 amphet, cocaine, THC, opiates, and PCP. Any + results MUST be confirmed. Thats were the phentermine will be explained. Best be honest

Doctor prescribed?: I am hoping that you are using this medication because it was prescribed to you by a physician for obesity. If you used this medication for any other reason, or if it was not prescribed for you but someone else, using it is illegal and don't do it again. If you are overweight or obese and want to lose weight, talk to your doctor. Share a list of all your medications when you are tested for drugs