Morning sickness

My friend is 11 weeks and suffering from terrible morning sickness. It’s been 2 days since she eaten . Everything comes back up even water.

Shes on Zofran? But said she’s still throwing up and feeling nausea . I just wanna help her but I don’t know how. She’s been to the hospital already and every medication they give her isn’t working. She throws up 5+ times a day. With NO FOOD. Any advice? Opinion?

They have her drinking sip of water every 5 min .. they told her not to worry about eating