"i am 25 year old phd student. i have been taking prozac for 5 weeks now. it started affecting me on the 3rd week. i felt so much more active and i had hope for living. i am working more efficiently and my sleep schedule is perfect. i am gaining some weight which means i should also start exercising. i still have vivid dreams and wake up several times during the night but i don&#039;t mind it because my life has changed so much and i feel so happy after years of depression."