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A 23-year-old female asked about a 34-year-old female:

Why does caffeine make me shake and make me feel terrible physically and mentally?

1 doctor answer2 doctors weighed in
Dr. Ralph Morgan Lewis
Family Medicine 38 years experience
Stimulant: Adenosine suppresses activity in the central nervous system. Caffeine antagonizes Adenosine & increases acetylcholine, epinephrine, dopamine, serotonin, glutamate, norepinephrine, cortisol (& inhibits GABA at higher doses). Inhibitors r blocked, stimulators r enhanced.

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Last updated Feb 18, 2015

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