The US Food and Drug Administration (FDA) recommends not consuming more than a total of 400 milligrams of caffeine per day in any form. You may take the No Doz tablet with or without food. Do not chew more than 2 pieces of the No Doz gum at one time. Do not swallow the gum whole.

How do you take No-Doz?

When and how should I take NoDoz? Always use NoDoz as directed, limiting your intake to ½ to 1 pill every 3-4 hours. It's important to keep track of your caffeine consumption and limit the use of other foods, beverages, and supplements containing caffeine while taking NoDoz.

Are No-Doz pills bad for you?

"The use of potent stimulants such as Benzedrine and Dexadrine is definitely dangerous to one's health. Stimulants such as "No-Doz" often cause severe nervous recation which, although temporary, is handicapping.