Intractable hiccups may develop with cyclophosphamide infusion.

@article{Ifran2004IntractableHM,
  title={Intractable hiccups may develop with cyclophosphamide infusion.},
  author={Ahmet Ifran and K{\"u}rşat Kaptan and Cengiz Beyan},
  journal={American journal of hematology},
  year={2004},
  volume={77 3},
  pages={319-20}
}