It is possible that you may have an underlying psychiatric disorder? I am not trying to be disrespectful at all, but just trying to ascertain if there may be something else going on.
Oxycodone is an Mu (endorphin receptor) agonist, and is not a hallucinogen.
If you took the Oxycodone with LSD, then the above scenario is quite possible. However, what you experienced is an extremely bizarre reaction to this particular pain medication.
It is interesting to note that "hallucinations" are listed as a side effect to aspirin. Do you get this reaction to all pain medications, or just the oxycodone?
I got off it that evening. The pain was less scary. Besides the oxycodone constipates you.
This is interesting. You could possible ave an allergy to the medication. What you describe is very atypical, except the constipation. Chronic opiod users often need to take a mild laxative. The majority of the body's Mu receptors actually are in the intestines. Over the counter "Immodium AD" is an opiod, actually a derivative of Demerol. This is why it is so effective at helping diarreah.
Only small amount crosses the blood/brain barrier, however, so few people abuse Immodium.
Oxycodone. Constipating, defintely. Talking cats ... I suppose there is a first time for everything.