I tried hylands teething tablets twice (one at full dose for my weight, once at half). Made me high as a flippin' kite. GREAT visual and auditory hallucinations, general euphoria, some concerning numbness/paralysis in my swallowing (making it occasionally difficult to breathe, but the euphoria kept that from being too concerning), some *very* disturbing arrhythmia for about 30 minutes (during the same time I had difficulty swallowing... the paralysis kept spreading down my throat into my chest, so it was probably fear based, but the irregular heartbeat tapered off as the numbness did, and I had quite a difficult time actually being afraid because of the euphoria).
Fortunately the hallucinations came on slowly enough I was able to arrange for emergency babysitting for my son. When I tried them again at half strength, I made sure that I had babysitting lined up. WORD TO THE WISE... do that before testing their effects on yourself. Same but milder effect on a half dose.
I'm REALLY glad that the FDA is finally looking into these buggers. During my "wild" years, back when god was a boy, I used street drugs that had less effect. I also am somewhat curious as to what if any correlation there is between hylands and SIDS. The difficulty swallowing/breathing that occured for about 30 minutes was seriously troubling. I had to time my inhales to miss my drooling. And a few times I got it wrong... but couldn't cough because of the spreading paralysis. But since teething usually starts off after the highest danger period for sids... I have no idea if there would be any correlation. Just something I wonder about.
It's no wonder they "work" so well, however. Even with all the scariness going on, I was happy as could be. And the hallucinations were quite entertaining. Dancing lights, color clouds, halos, trailers. I'm surprised teens don't use them more than they already do.
After testing the effects on myself, I threw them in the trash and wouldn't let my son have any. If I'm lucky he'll avoid "wild" years entirely. While he may have to occasionally have strong meds for surgery or broken bones, tylenol is good enough for cutting teeth!