Tramadol-Induced Hiccups: A Report of Two Cases.

Hiccups can be idiopathic, psychogenic and organic, with drugs being one of the most important causes of hiccups. Although the exact pathophysiological processes involved are still poorly understood, the neurotransmitters dopamine, serotonin, and γ-aminobutyric acid (GABA) have been documented to play a significant role in the generation of hiccups. We report on two patients with cellulitis who developed hiccups with the use of tramadol as an analgesic. The possible mechanisms and clinical implications of this rare adverse event are discussed. Both patients recovered from the hiccups with the use of baclofen tablets.