Reproductive toxicity studies with oxybutynin hydrochloride

Area of Science:

• Pharmacology
• Toxicology
• Reproductive Science

Background:

• Oxybutynin hydrochloride is an anticholinergic and antispasmodic medication.
• Understanding its impact on fertility and development is crucial for patient safety.

Purpose of the Study:

• To evaluate the effects of oxybutynin hydrochloride on rat fertility and peri-postnatal development.
• To assess the embryotoxic potential of oxybutynin hydrochloride in rats and rabbits.

Main Methods:

• Fertility and developmental studies were conducted in rats.
• Embryotoxicity assessments were performed in rats and rabbits.

Main Results:

• In rats, high doses of oxybutynin hydrochloride were associated with maternal toxicity, increased fetal malformations, prolonged gestation, and impaired offspring postnatal performance.
• Lower doses of oxybutynin hydrochloride did not affect reproductive processes in rats.
• Oxybutynin hydrochloride did not impact embryonic or fetal development in rabbits.

Conclusions:

• Oxybutynin hydrochloride may pose risks to fertility and development in rats at maternally toxic doses.
• The drug appears safe regarding reproductive and developmental toxicity in rabbits and at lower doses in rats.