Ehm, no. When smoking weed, your screen will start moving side to side, sometimes making it difficult to run right.
There are three things about it I know of.
One is, sometimes when smoking weed, you'll get the drunk guy animation at about ten second (?) intervals. Rarely though.This one used to piss me of during gun fights; when and if I get the animation, I know I'm either killed or arrested, because it won't allow me to sprint or shoot.
Second is the screen not moving.
Third, very rarely, it won't increase your health.