I'm not entirely sure how to classify the following drugs, but they are listed as well under "prescription":
Viagra
Xanax
Alprazolam
Colnazepam
and Amphetamine salts

Have you accessed a tor hidden service before?  I think you can find a browser for PowerPC here: https://www.torproject.org/dist/vidalia-bundles/vidalia-bundle-0.2.1.30-0.2.10-ppc.dmg.  And here are some instructions: https://www.torproject.org/docs/tor-doc-osx.html.en