Caffeine pills (usually found as caffeine citrate) are over-the-counter or prescription drugs classified as central nervous system (CNS) stimulants. The pharmaceutical information website Rxlist.com states that caffeine is “an odorless white crystalline powder or granule, with a bitter taste.” Caffeine occurs naturally and is found in common products like coffee, tea, soda, kola nuts and guarana berries. Continue reading
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