Melatonin is not used to lower your pulse rate. Good Luck
Answered 1/27/2023
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Hydrate well prior, during and after donation. Do not use supplements or drugs not prescribed by your doc.
Answered 1/31/2023
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Melatonin will not change your heart rate. The only preparation usually needed for giving blood is to be well hydrated prior to and afterwards. Good luck.
Answered 1/27/2023
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