Agreed, doses of over 12.5mg ephedrine make me feel like shit physically and like my head is tingling, not in a euphoric way.
The side effects of 25mg Ephedrine resemble those from regular dosages of Adderall, as I suspect L-amp is very similar to Ephedrine, albiet a lot more potent on a mg per mg basis, and even "dirtier" than Ephedrine, imo.
Used responsibly, Ephedrine is actually a very underrated substance, and it only lasts 4-6 hours per dose, so you can actually sleep on it. More college kids should use it.
I wonder how bad people's hearts are who have to take 75-100mg ephedrine a day for their asthma, lol. I wonder if anybody who buys Ephedrine actually uses it for its bronchiodilating properties.