The PDQ cancer information summaries are reviewed regularly and updated as new information becomes available. This section describes the latest changes made to this summary as of the date above.

Adverse Effects ¹

Added text ² about a man aged 55 years with squamous cell carcinoma of the maximillary sinus who purchased hydrazine sulfate from a source found on the Internet and proceeded to take it without medical advice or supervision (cited Black et al. as reference 15).