It takes 5.5 half life's for the medicine to be totally eliminated. This is one of the most asked questions about Phentermine because of its similarity to amphetamines and false-positive results of a drug screen. Adipex (phentermine) has a half life of approximately 25 hours. Therefore Adipex will be in your system for approximately 137.5 hours (5.5 x 25) i.e.5.7 days (or 6 days). How long would phentermine stay in your system? Hello michdee. The active ingredient phentermine also has some severe side-effects that harm your body. And the answer is — like for other drugs, time frames vary from person to person. How long does half of one 37.5 mg phentermine tablet stay in your system which would show up on a drug test. The active ingredient phentermine can still be detected in a hair sample for up to a month. A study in the International Journal of Obesity conducted with patients who were taking phentermine long term for durations of up to 21 years found that phentermine did not result in psychological dependence in any of the patients. If I take one tablet of phentermine 37.5 how long does it stay in your system as a drug? Asked 31 Mar 2011 by anacleta lucrecia Updated 25 January 2012 Topics phentermine If it is being used with legitimate prescriber, then even a … for a refill on my birth control pills, as well as have some lab work done and today was the 2nd day that i have been taking phen. The actual theraputic effect of taking the Phentermine would be about 24 hours. The drug can be detected up to 6 days in your system. * Paracetamol act on the peripheral nervous system to manage the pain. Carefully follow your doctor's instructions for a reduced-calorie diet plan and regular exercise. Swallow the tablet whole. I have to go to my local health dept. Dr. Jalal Zuberi answered 44 years experience Pediatrics About 14 days: Is how long internet resources suggest it might appear in a urine drug test. I was on Adipex (phentermine) last year and after being on it for about a week and I started dropping the weight. how long does half of one 37.5 mg phentermine tablet stay in your system which would show up on a drug test. How long does Phentermine stay in the urine? Do not crush, break, or chew it. Talk with your doctor before starting an exercise program. * Paracetamol is drug use for the pain management. Dr. Jalal Zuberi answered 45 years experience Pediatrics However, it only stays in your blood for around 24 hours, and your urine for about 3 days. Here are the great questions I … 24 years experience Emergency Medicine. How long does Duromine stay in your system? I think I lost 20 lbs in my first month. They did not experience cravings for the drug or any other symptoms typically associated with amphetamine withdrawal. Dr. Donald Alves answered. Test yourself if using Phentermine. How long and will Phentermine stay in your system? The key to it is to make sure you stay to your calorie count and drinks lots of water. My doctor put me a … Phentermine (Adipex-P), an amphetamine derivative, is the most prescribed weight loss medication in the United States.Available as a low cost generic, phentermine has been approved for weight loss since 1973. , break, or chew it the active ingredient phentermine can still be detected up to 6 days ) 25... Symptoms typically associated with amphetamine withdrawal the actual theraputic effect of taking the phentermine would about... Tablet of phentermine 37.5 how long internet resources suggest it might appear a... 31 Mar 2011 by anacleta lucrecia Updated 25 January 2012 Topics phentermine how long would phentermine in! Mar 2011 by anacleta lucrecia Updated 25 January 2012 Topics phentermine how long will. 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