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Usage Directions


The phentermine usage directions provided below are specific only to the average doses. The actual recommended dose of phentermine could be different for different patients. We strongly recommend that you follow the directions for using phentermine provided by your doctor or as noted on phentermine package.

FDA recommends that phentermine is used short-term (not more than 12 weeks), and its usage is combined with "non-pharmacological" approaches to weight loss such as healthy dieting and exercise. At other side, the recommendations which limit phentermine use for short-term treatment are sometimes controversial. The one reason of limiting phentermine use is drug tolerance: phentermine may loose its appetite suppressing effects if the body adjusts to this drug. On the other side, statistics shows that phentermine stayed effective evein in a 36 week trial (as noted in PMID 11054601).

Phentermine 37.5mg tablet 60

Phentermine should be taken on an empty stomach, once daily, before breakfast or 2 hours after breakfast, depending on directions given by your doctor. These requirements are set due to the risk of insomnia, so it is generally recommended that phentermine is taken at specified time range. Swallow whole; do not break, crush, or chew tablets before swallowing. As phentermine may disrupt normal sleep patterns, make sure you take a dose at least 10 to 14 hours before the bedtime. If you are taking more than one dose of phentermine per day, take the last dose approx. 4-6 hours before you go to the bed.

Oral dosage form for adults (under age 60):

  • Capsules - 15 to 37.5 mg phentermine once a day before breakfast or 1 up to 2 hours after breakfast;
  • Tablets - 15 to 37.5 mg phentermine once a day before breakfast or 1 up to 2 hours after breakfast. Your doctor may also tell you to take 15 to 37.5 mg phentermine in divided doses one-half hour before meals, instead of taking one dose per day;
  • Resin (Capsules) - 15 to 30 mg phentermine once a day before breakfast.

Oral dosage form for adults (age 60 and over):

Depending on your health conditions, it could be necessary for you to take the reduced dosage of phentermine. Please consult your physician to know for sure.

Oral dosage form for infants and children (under age 16):

Phentermine is not recommended for children under age 16.

General phentermine usage instructions, which you should definitely take care of, are the following:

  • Take phentermine only as it is directed by your doctor or a pharmacist;
  • Avoid taking more phentermine than prescribed (refer to cautions section for more details);
  • Avoid overdose (do not take phentermine more often than prescribed);
  • Avoid taking phentermine for longer time than your doctor ordered.

In case you miss a dose of phentermine, go take it ASAP (even make the day longer if it would be necessary to satisfy the above requirements). However, if it is afternoon, do not hesitate to skip the missed dose and go back to your regular dosing schedule starting the following day. And never double dose of phentermine - keep yourself out of danger.

If you think that phentermine is not working properly after you have taken it for a few weeks, please consult your doctor. It is strictly recommended that you do not increase the dose.

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