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Expandexplorelive t1_j10lurx wrote

Reply to comment by Dr_Vanc_Zosyn in What happens if a person take caffeine and nicotine together? Net vasoconstricter or Net vasodilator? by EastEntertainment947

This says it produces cerebral vasoconstriction. This is why it can help treat headaches.

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TryhardHS t1_j12n143 wrote

It’s definitely a vasoconstrictor. I have arteriovenous malformations that ache when I take vasodilators (including alcohol). Caffeine reduces pain from the malformations due to being a vasoconstrictor. I can feel it working.

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