What other drugs besides pipes/meth can be in bunk pills?

[wiiwee]

I had one that turned bright yellow on the marquis one time

 

[battleSHOP]

All kinds of stuff...scroll through http://www.ecstasydata.org/

 

[Bearlove]

Dealers/pressers can put anything into pills - have a quick look through the ecstasydata as they highlight the common ones.