No condition and no medical diagnosis. For the past few years I've been afflicted by periods of existential crisis and L-DOPA short circuits this. Much better mood, focus and most importantly — drive (which is what helps most with the EC). Feels almost as good as how I felt when in my teens¹.

As others have mentioned I simply buy them off of Amazon.

¹completed my 37th trip around the sun yesterday, the 17th.

If citrulline were Rx-only in the US, then I doubt Doctor's Best would make it and I doubt Walmart would sell it:

https://www.walmart.com/ip//150061958

L-citrulline is on the GRAS list. There are dozens of supplements for sale on Amazon.

What does Rx mean?