I initally had a faint recall from my BTEC forensic sci lectures; about certain "shaped Pills"
It sounds suspiciously like the orgional branded Diazepam (Valium)
10mg tablets. I have enclosed a picture for reference:
Image
iazepam(Valium) DOJ.jpg - Wikipedia, the free encyclopedia
Even of they werent exactly like those pictured (circular hole instead of heart shaped hole) it could have been one of a number of benzodiazapines manufactured by another company. American drugs companies espeically have this obsession with "designer shaped" branded pills; one only has to look at the "blue pill" infamy Viagra has gained.
Best Regards,
mr_colt.