[bryanlarsen]

Another reason to not regularly use caffeine is that it can be an effective medication, especially in combination with other medications. Caffeine increases blood flow in the brain, so it can be effective for headaches, and it increases the absorption of other drugs like ibuprofen and acetaminophen.

If caffeinated is your normal state, then it becomes much less effective at treating migraines, hangovers and other headaches.

[city41]

This site says just the opposite

> Caffeine narrows the blood vessels in your brain. Without it, your blood vessels widen.

https://www.healthline.com/health/headache/caffeine-withdraw...

[bryanlarsen]

Okay, I may have the mechanism wrong, but you've confirmed that it's active in brain blood flow. It's definitely an effective medicine and complement, at least for me. It's included in many OTC cold & headache mixes for a reason.

[city41]

Yeah, for sure. This post and these comments just made me google caffeine for a bit.

If I don't get my morning cup I almost always get quite the headache, so I'm not surprised.