Medical Marijuana Flight?

Question, can you fly to other countries with your medical marijuana? If so How much are you allowed to carry?

I'm not entirely sure on this, but I think the more plausible answer is HELL no. If you land in another country where it is illegal, I don't think that would go over well with the authorities...

Yeah, but what if its legal in another country? Lets say for example Mexico. Would you have to go through a process?