Can i take more than 0.5 grams of triazolam for dental work?

NO!: Maybe a typo, but 0.5 grams is about 1000 times the normal dose for Halcion (triazolam). Normal for dental work is 0.25-0.5 milligrams. You should follow dosing as recommended and prescribed by your dentist. If you feel strongly that you need a higher dose, discuss it with your dentist, but do not self prescribe--that's dangerous.

Not advised: 0.5 grams of triazolam is 1000 times the recommended therapeutic dose of 0.5 milligrams of triazolam! if you were speaking of milligrams, instead of grams, you could certainly take a larger dose, but with the supervision of the treating dentist.