Provigil (Modafinil) and Finasteride Interaction: What Clinicians and Patients Should Know
How modafinil and finasteride may interact, what the drug labels and human interaction study show, and how to review hair, urinary, and PSA changes.
Modafinil: Drug Interactions
5 source-based articles maintained by the HealthRX.com Editorial Team.
5articles
2topic areas covered
May 26, 2026latest review
Modafinil: Drug Interactions library
Showing 5 of 5 clinical reviews.
Provigil (Modafinil) and Metformin Interaction: Safety, Risks, and Clinical Guidance
Is it safe to take Provigil (modafinil) with metformin? A guide covering CYP enzyme interactions, blood glucose effects, monitoring protocols, and dose-adjustment considerations.
Provigil and Sildenafil Interaction: What Prescribers and Patients Should Know
Modafinil (Provigil) and sildenafil share CYP3A4 metabolism. Learn the pharmacokinetic interaction, clinical severity, dose adjustments, and monitoring recommendations backed by FDA labeling and primary literature.
Provigil and Tadalafil Interaction: What You Need to Know
How modafinil (Provigil) and tadalafil (Cialis, Adcirca) may interact through the CYP3A4 enzyme pathway, what is established from FDA labeling versus what remains unstudied, and what to verify with a prescriber or pharmacist.
Provigil and Testosterone Interaction: What Clinicians and Patients Need to Know
A guide to the modafinil and testosterone drug interaction, covering CYP3A4 induction, androgen pharmacokinetics, polycythemia risk, lipid effects, and clinical monitoring protocols.