I started 30 mg phentermine 3 days ago. I'm 57 5'7" and 179 lbs. GW is 140.I've read pages of reviews. Some say force yourself to eat small meals and some are eating as little as 500 .calories. My problem is I'm terrified of eating anything thinking it will ruin the effects of the drug. I get hungry but won't let myself eat! I only get it for3 months so I have to make the most of it.