A man goes to the doctor and tells him that hehasn't been feeling well.

The doctor examines him, leaves the room andcomes back with three different bottles ofpills. The doctor says, Take the green pillwith a big glass of water when you get up.Take the blue pill with a big glass of waterafter lunch. Then just before going to bed,take the red pill with another big glass ofwater.

Startled to be put on so much medicine theman stammers, Jeez doc, exactly what's myproblem?

The Doctor says, You're not drinking enoughwater.