nostr:npub1srhg4hk63ew68kepu0znazgf9tdl089dkur5artp440htxqrc8zsqz8g90 nostr:npub1fy0rmllrferlxdn3kuhfs3m9squnfmp8c0na6ht6jj4v24uhjl8qxyzn9y I once had codeine for a headache and it helped a lot but I'm pretty sure it's just because it relaxed the head and neck muscles and knocked me out. It probably helps with tension headaches for that reason.