Pennyroyal for Inducing Menstruation: Dangerous and Not Recommended

Pennyroyal (Mentha pulegium) is toxic. Its essential oil contains pulegone, metabolized to menthofuran, which causes hepatotoxicity, nephrotoxicity, seizures, and death. Historical use as abortifacient led to fatalities. Never use pennyroyal to induce menstruation. For menstrual irregularities, consult a clinician: evaluation for PCOS, thyroid, pregnancy, etc. Safe medical options exist (progestin withdrawal, combined OCPs).