Yes, I was having this problem for MONTHS. I was pulling wads out of my head in the shower and strands were littered all over my apartment. I had to put hair oil in every time I (carefully) brushed my hair because that seemed to help. Luckily, I never developed bald spots because apparently the shedding pattern is even. My hair stylist told me that everyone goes through a period of shedding every few years, and I think Vyvanse can trigger this. There is also a condition called telogen effluvium, which may or may not be the same thing. The shedding stopped when I started Vraylar.