The role and uses of caffeine
1. Low dose (50-200mg) can make drowsiness disappear, fatigue relieved, spirits refreshed and thinking agile.
A larger dose can directly stimulate the respiratory center and vasomotor center of the medulla oblongata, accelerate and deepen respiration and increase blood pressure.
The toxic dose can excite the spinal cord. It can also dilate bronchial smooth muscle, diuresis and stimulate gastrointestinal secretion.
The central excitation and relaxation of bronchial smooth muscle of caffeine may be related to its blocking of adenosine receptor.
2. It is mainly used to fight against the state of central inhibition, and it can also be used to treat some migraines.
3. Excessive dosage can cause convulsion.
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