If I start getting more powder from my friend for later uses, like say months and months down the road, would the substance lose potency? Does it start to break down? Do I need to store the powder I have remaining in any particular fashion? Thanks, I am thinking about trying to get him to send me more, but I don't want to get it if in 4-5 months I won't be able to use it as well. I'm definitely not going to start using every weekend or every other weekend. I have almost 600mg left of what I now know is real molly, and I plan on waiting at least a month before going again, and maybe even then only using around 200mg. This last time was experimental: to learn how the drug effected me and how to best use it. I do plan on using MDMA again and again, but with caution and infrequently.