Re: breathing difficulty!

Phentermine does have some reported side effects. These include:

Mild

Blurred vision, dry mouth, sleeplessness, irritability, stomach upset or constipation may occur the first few days as your body adjusts to the medication. Other adverse events include central nervous system effects, gastrointestinal disturbances, and changes in libido. Alcohol can increase unwanted side effects of dizziness.

Moderate

Chest pain, pounding heart, difficulty urinating, breathing difficulties or swelling while taking this medication