You could get unsweetened tonic water and dehydrate it in a food dehydrator and then scrape that powder into a capsule.  Just know what you are doing and have a microgram scale.  What I'm saying here is not a suggestion or medical advice but for entertainment purposes only.  Don't be dumb, kknow what you are taking, and HOW MUCH.  dose very important.  Don't hurt yuourselves.  For the record I'm saying specifically DO NOT do what I suggest.