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The investigation of new drugs is slow and costly. Drug repositioning, like with Hydralazine (HDZ), an old antihypertensive, can accelerate the process. HDZ and its hydrazonic derivatives exhibit diverse biological activities, promising for new drugs. This review explores HDZ's repositioning potential and its derivatives' applications in various biological activities. It identified 70 relevant articles through database searches. HDZ shows potential in neurology, oncology, nephrology, and gynecology, with clinical trials up to Phase III. Hydralazine-valproate, marketed in Mexico, proves effective in combination with chemotherapy. Hydrazonic derivatives offer broad applications in medicine. Studying their structure-activity relationship can enhance efficacy. This review summarizes their properties and pharmacological activities succinctly.
Romão et al. (Mon,) studied this question.