Phentermine should be taken on an empty stomach, once daily, prior to breakfast. If in tablet form, the tablet may be broken or cut in half. Do NOT break, crush, or chew capsules.
As phentermine may disrupt normal sleep patterns, avoid taking a dose late in the day. If taking more than one dose a day, take the last dose approximately 4-6 hours prior to going to bed.
The following information is specific only to the average doses of phentermine. The recommended dose of phentermine may be different for different patients. If your dose is different, do NOT change it unless your doctor tells you to do so.
Adults under age 60 taking phentermine
Adults age 60 and over taking phentermine: A reduced dosage may be necessary. Consult your physician.
Infants and children taking phentermine: Phentermine is NOT recommended for children under age 16.
Maximum dosage recommendations
Take phentermine ONLY as directed by your doctor.
If too much phentermine is taken, it may cause unwanted effects or become habit-forming.
Please speak with your doctor if you think that phentermine is not working properly after you have taken it for a few weeks. DO NOT increase the dose.
However, to enhance the effects of your phentermine pills or after you stop taking phentermine, Phentermine.com officially recommends Phen Caps as a supplement.
If you want to learn more about Phen Caps, click here.
If you miss a dose, take it as soon as possible. However, if it is almost time for the next dose, skip the missed dose and take only the scheduled dose. Do NOT double the dose.
In case of overdose
It is unlikely for an overdose of phentermine to be life-threatening. If you or someone you know takes a much larger dose than recommended, please phone a doctor, 911, or the nearest poison control center immediately.
Sharing your phentermine prescription
Do NOT share your phentermine prescription with others.