Hepatitis C
"I took Harvoni for 12 weeks.
Out of those 12 weeks there were only 2 days that I really suffered with terrible headaches. Someone told me to stay away from all headache meds except 
believe it or not, Tylenol. Please check with your doctor first. Drink plenty of water
After that.no more headaches. After treatment viral load zero. Waiting now for the 3 month test. I am geno 4.
"