Name this movie-Aliens and death pills.

This is a strange movie that I recall seeing about 30 years ago. It had (I believe) John Carradine in it and I don’t know who else. Aliens captured 3 of , well, I don’t know…“the world’s top scientists?” from different countries.At least one of them were chinese; i think that the other 2 were 1 russian and 1 american. The aliens say that they are tired of all of the international fighting, give the three some magic pills that they can speak to and it will destroy the other two scientists and the nations that they represent. It was totally a crap movie, but it is worth watching for the schlock value. Now, I want it!
can anybody help?
thanks,
hh

Here’s John C’s IMDB page, FWIW. Couldn’t see anything like that movie on it though.

It sounds something like “The 27th Day” with Gene Barry. Five people from around the world are selected by an alien and given capsules which if used will make people vanish, but leave behind everything else.

See the IMDB entry here:

http://us.imdb.com/title/tt0050085/

I thought it was an ok movie when I saw it as a kid.