So unfortunately going to have to stop with this mystery pill. Felt great this morning and gave it another shot but 4 hours later I'm in the same boat with light heaviness and a headache. Sucks as I really enjoyed the energy from it but not these effects. Since I was only given this one and a lot of it, let me know if you have someone that was wanting to try this one and I can send to them to gauge so these don't go to waste!! I've never had this happen with a stim before so betting it's the ephedra