also known as singultus

an attack of recurrent hiccups, usually lasting more than eight hours.

Intractable hiccups are usually a symptom of something else wrong. for example:

• abnormal stimulation of the phrenic nerve
• stress
• reflux / esophagitis

treatment options for extreme cases include:

• anti-convulsants
• chlorpromazine (Thorazine) and haloperidol (Haldol)
• cutting the phrenic nerve

Chronic hiccups can result in dehydration, weight loss, insomnia, and fatigue, due to inability to eat, and sleep.