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Topical 2–5% solution or 5% foam applied to the scalp (men: 5% twice daily or once-daily foam; women: 2% twice daily or 5% foam once daily). Low-dose ORAL minoxidil is off-label and clinician-titrated, typically 0.25–5 mg once daily. A drug — not an approved supplement regimen.

Morning

Topical 5% foam/solution (OTC) for most; low-dose oral minoxidil under a clinician for poor topical responders

• Pheochromocytoma (oral — vasodilator)
• Significant uncontrolled cardiovascular disease without clinician oversight (oral)
• Known hypersensitivity to minoxidil or vehicle (e.g., propylene glycol in some topicals)

• Other antihypertensives / vasodilators
• Guanethidine