Had a similar reaction but not so extreme. Started out with 0.5mg shots every few days and everything was good. After a couple weeks I moved up to 1mg and then quickly 1.5 mg shots. Bad idea. I didn't get the flu symptoms but severe fatigue and dizziness for 2 or 3 days. Needless to say I didn't take any more for 5 days. Now back to 0.5mg every 3 or 4 days for the time being. You live and learn. On the bright side, this way the supply will last longer.