Hi and welcome to HCM.
Sorry about your father.
Wait and see will zofran
be helpful, there are many other antiemetics, but you ve already used the most effective ot them.Maybe Prochlorperazine
may be helpful, but i also recommend to combine all these medcines with benzodiazepines.Try to find food or suplements which doesnt make him vomiting
. If there is no improvement the only option will be parenteral nutrition. Wish you good luck .