zofran and what else for nausea

thank god it isn't cancer

but my sister has hepC from a blood transfusion over 30 years ago
she just started a difficult routine of meds, that have to be taken on a very tight schedule around the clock- and some of the pills have to come 30 mins after a snack of 20mg of fat.
She is working with a hep specialist- who "forgot" to mention nausea was a common problem with this med and "forgot" to give her something, say, like zofran for it.

So at 1:30 this morning after 20 mg of fat (ice cream) she takes her one pill and then begins the struggle to keep it down. Dry gagging so bad she woke her husband up, took her to the ER, got her on zofran. No options whatsoever to vomiting or waiting till she feels better before taking these meds- the meds and the schedule of those meds are critical to getting her hepC free.

She is still queasy even after zofran- is there anything stronger she can take?

thanks for your help!