How long in advance do I stop taking 15 mg of Phentermine before smart lipo of outer thighs, hips and back?

180lbs female, 37 y/o

Doctor Answers 6

DIET Pills and Surgery

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Thanks for your question. The issue with Phenteramine is that as soon as the anesthesiologist puts you to sleep, your blood pressure can drop to dangerously low levels and its difficult to elevate your blood pressure. Since most surgery performed for cosmetic reasons is done in a outpatient center, any issue can buy you an ambulance ride to the ER. For that reason, many anesthesiologists will not put anyone to sleep if they have not stopped Phenteramine for at least two weeks. Your safety is everyones first priority. Hope this helps


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Part of it depends on whether you are being sedated or having anesthesia, you will need to be off 2 weeks for the anesthetist.  The reason is phentermine can suppress your natural ability to regulate your blood pressure, causing a dangerous situation with some medications.
If you are just going to be under local, I agree that 2 days is probably adequate, and I would not re-start for 2-5 days but go by your physicians instructions.

Stopping all questionable meds 1-2 weeks before surgery is common sense

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Medications fall into categories regarding their effects on surgery: bad for surgery, not bad for surgery, and unknown/questionable. Phentermine falls into the latter. Any medication on which data is lacking or inconclusive regarding safety in surgery is best avoided for a reasonable time interval before surgery.

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Phentermine and lipo surgery

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I tell my patients to stop taking phentermine at least 48hrs prior to surgery. 

John Bergeron MD


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I tell my patients to stop taking phentermine at least 1 week prior to surgery. Phentermine is a stimulant which can make anesthesia more difficult.

Christopher Balgobin, MD
Minneapolis Physician
4.7 out of 5 stars 36 reviews

Medication prior to Smart Lipo- Phentermine

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Medications such as Phentermine should be held two weeks prior to liposuction. I suggest consulting with your physician prior to treatment and following his/her requests regarding medication administration. Best, Dr. Emer

Jason Emer, MD
Los Angeles Dermatologic Surgeon
4.8 out of 5 stars 207 reviews

These answers are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.