What methods do people commonly use to treat hair loss?

I'm worried because it seems like I'm experiencing postpartum hair loss. It's not severe, but I feel like a lot of hair is falling out, especially around my forehead. A surprisingly large amount of hair falls out when I wash or dry it. I'm using anti-hair loss shampoo, but it doesn't seem to have a dramatic effect. I also tried hair loss medication recommended by an acquaintance, but I had to pass on it because it upsets my stomach. I'm curious how others manage their hair loss.

Please share the information.