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Comment by roywiggins | Hacker News Reader

I suspect I am an unusually fast metabolizer, since I can be tipped over into very nasty withdrawal headaches extremely easily, even when my baseline consumption is a couple of smallish coffees in a day. The only way I've found to fix this is to get almost completely off it, which as you might imagine I find very difficult to do, since I have to step down very carefully.

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Sounds to me more like you consume _a lot_ (therefore have a very strong physical dependence) rather than having extremely fast metabolism.

Alternatively, you might be prone to migraines, and thus are sensitive to headaches of all kinds. That's me, I truly hope that's not you (wouldn't wish that upon anyone).

I promise I don't. I can be on a teaspoon of strongish instant coffee twice a day and it still happens sometimes (though it's worse when I'm drinking more of course). It can happen literally overnight, even when I'm on a steady intake.

The headaches are reliably cured within maybe 20-40 minutes by application of more caffeine, so I don't think they are migraines.

I'm not a regular drinker and even a coke after 11 am means I'm going to have a late night. It's frustrating how often there are no caffeine-free diet soda options.

My withdrawals only kick in on the second day of no caffeine. Also, I feel a cup of coffee on the day I drank it and the day after (with no additional caffeine). :D I guess I'm turbo slow. Although I didn't use to be...

For me it can happen in less than 12 hours, which can mean overnight. It's not a great time!

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