(never tried it) has been found to bind to opiate
receptors. Not OTC in the true sense, but not illegal and easy enough to obtain. Also, I've heard in some locations you can legally buy cough syrups or pills containing small amounts of codeine
OTC- not where I live, but worth looking into- this will give an opiate high. Another choice, again not OTC in the strict sense, but have you heard of poppy
tea? This is the opiate high in the most traditional sense- direct from the opium
poppy. Never tried this either, but apparently effective. DXM
and other dissociatives
- may be chemically related to opiates
?- but swim
has tried both diacetylmorphine
IV and insufflated, and many synth and semi-synth opoids, and she would not compare the dxm "robo-trip" to an opiate high in any significant way. Just swim's two cents worth..
EDIT: Found this by INodHardOhYeah on the opioid
potentiation thread- don't know any more info on the topic, but worth looking into:
Loperamide (Immodium): This drug is related to meperidine/pethidine (Demerol) but does not cross the blood-brain barrier in sufficient quantities to cause euphoria. However, the consumption of doses of 150-300% of the therapeutic dose when mixed with high doses of codeine or meprobamate have been reported to produce a weak Darvon-like buzz aside from the effects of the other drugs.