Click here to visit the Vivarin site and fill out the form to request a free sample of their Vivarin Caffeine Alertness Aid. They’ll send you two samples to try out.
In case you’re wondering what it is, this is what their site says: “The only active ingredient in Vivarin is caffeine. Vivarin has been recognized by the FDA as a safe and effective way to help keep you mentally alert and focused. It’s just like having coffee or soda.”
Image credit: vivarin