^ this. 100%
I like it with a cup of coffee when I get up early to get stuff done but I wouldn't call it recreational in the least. Also, when you overdo it, it feels practically the same as a panic attack. All the peripheral overstimulation of amps without any of the fun. I find it can be quite anxiogenic (anxiety-producing) as well.
I generally take 37.5 or 50mg of ephedrine HCL unless I have been using it daily in which case I might increase that slightly. My girlfriend who is a tiny person generally takes 25mg. I would certainly not exceed 25mg to start regardless of size, I could definitely feel 25mg when I first tried it but I have a slight permanent-tolerance now because I've used it regularly at times.