So I started Anadrol 50mg, once a day one week ago. Starting about 4 or 5 days ago, I am getting insane headaches when I start with my weight training session. Starting with squats for example. The rush is so bad, I have to sit down. Unbearable headaches. It is in the back of my head, upper neck. WTF???? Any known issues, or is this a serious issue?