I started phen. a couple of weeks ago and ten stopped when I had a sinus infection. I had a lot of canker sores and a sore tongue- like I burned it on coffee. I thought perhaps it was the antibiotics I was on that caused it. After the round of antibiotics I started phen. again (by the way it was very successful when I was on it. No cravings at all and I drank a ton of water) and once again had the mouth pain. It got so bad I had a hard time talking! It takes a miracle to get me to stop talking! Anyway, anyone else experience these side effects? Is there anything I can do to lessen it? I desperately want this to work!