"i have been on phentermine for about 6 months and i am now almost 40 pounds down. i have major side effects that i never got before. i have extreme hair loss and i have some bald patches in my head, i just turned 28! my doctor isn&#039;t concerned at all and states it&#039;s just a side effect and wants to &quot;wean&quot; me off so i don&#039;t &quot;withdrawal &quot; after being on it for 6 months. my nails grow cracked now and i have to apply layers and layers of nail polish to keep them from braking and bending. it&#039;s awful, i even had to cut my long hair just to avoid my hair falling out so much. i&#039;m scared to take showers, brush my hair and even run my ringers through it since my hair falls out in chunks. irreversible alopecia is not something i want"