- A terrible idea
Sucking this type of drug straight into your airway and lungs is just a terrible idea, since prescription drugs should always be taken as they are designed to be taken. If a product is meant to be swallowed, it may be a time-release drug that acts on the human body over a period of hours or even days. When you smoke something, you'll completely change the way the drug reacts inside of your body, increasing your chances of a bad reaction, including nausea, headaches, dizziness, and worse.
- Use common sense
If you are thinking about smoking your diet pills, just use your common sense? Does it really make sense to smoke something that is intended to be swallowed with a bit of water? Is it really that hard to take prescription medication by popping it into your mouth and then having a sip of water to wash it down?
Maybe you find swallowing pills traumatic? If you have issues with swallowing pills, consider addressing these issues rather than putting your health at risk by smoking prescription diet medication sold in capsule form. Talking to a doctor should reinforce the opinion stated here.