Weight Loss Home > What Is the Strongest Strength of Phentermine?
- Phentermine 15 mg capsules
- Phentermine 30 mg capsules (blue color), equivalent to Fastin®
- Phentermine 30 mg capsules (yellow color), not equivalent to Fastin
- Phentermine 37.5 mg capsules
- Phentermine 37.5 mg tablets.
The recommended dose of phentermine capsules for weight loss is 15 mg, 30 mg, or 37.5 mg once daily in the morning. For the 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.