The recommended dosage of phentermine for the capsule form is 15 mg, 30 mg, or 37.5 mg once a day. With the tablets, the recommended dose is 18.75 mg (half a tablet) or 37.5 mg (one tablet) once daily. If needed, your healthcare provider may increase your dose to half a tablet twice a day. The medication is intended for short-term use only.
The dose of phentermine your healthcare provider prescribes will vary, depending on a number of factors, including:
- Whether you develop bothersome or dangerous phentermine side effects
- How you respond to the drug
- The particular phentermine product
- Other medical conditions you may have
- Other medications you may be currently taking.
As is always the case, do not adjust your dose unless your healthcare provider specifically instructs you to do so.
The recommended dose of phentermine capsules for weight loss is 15 mg, 30 mg, or 37.5 mg once daily in the morning. For phentermine tablets, the recommended dosage is 18.75 mg (half a tablet) or 37.5 mg (one tablet) once daily in the morning. If necessary, your healthcare provider may recommend taking half a tablet twice a day to control your appetite, although this increases the risk of insomnia.
Phentermine is intended for short-term use only (for just a few weeks). Longer use is not likely to be effective, since the body adjusts to the appetite-suppressing properties of the drug. Also, phentermine is habit-forming and has the potential to be abused, which is another reason why its use should be limited to just a few weeks.
Considerations for people taking phentermine include the following:
- Phentermine comes in tablet and capsule form. It is usually taken by mouth once daily, although some people may need to take it twice a day.
- Your dose should be taken either before breakfast or one to two hours after breakfast, depending on the particular phentermine product.
- This medication should be combined with an appropriate diet. It is not meant to be used without dieting.
- Do not take phentermine more often or at higher doses than prescribed, as this can lead to addiction or dependence.
- For the medication to work properly, it must be taken as prescribed.
- If you are unsure about anything related to your phentermine dosage, please talk to your doctor, nurse, or pharmacist.