A type of functional GI disorder. Thought to be similar to migraine – periodic, sudden onset repeated vomiting, but without headache. Then fine for weeks/months.

Can be severe enough to require admission for IV fluids. Even if not, child can be wiped out for days.

Try hot baths or showers.

Ondansetron is the mainstay of treatment. Melts make sense. Sumitriptan spray/tablets. The sedating antihistamine Promethazine is helpful in some cases and has a lower wide effect profile than perhaps some other anti-sickness medicines.

Electrolyte solutions rather than just water, ideally containing some sugar for energy. These come in gel, bottle or powdered form.

Adults with this condition often use cannabis!

Else Amitriptyline or Topiramate.