Oral minoxidil for hair loss: Does the pill really work?

In the years since the pandemic, hair loss has become a more open conversation among women, with the rise of GLP-1 medications bringing renewed attention to hair shedding. My first introduction to oral minoxidil came from understanding how different it was from the topical treatments I had always associated with the ingredient. Minoxidil was originally developed in the 1970s as a medication for severe hypertension, but doctors soon noticed an unexpected side effect: increased hair growth. “Doctors noticed that many patients taking it began growing more hair, including on areas of the scalp where the hair had started thinning,” says Dr Chetna Chhabra, Clinical Lead, Clinikally. This eventually led to topical minoxidil becoming a recognised treatment for male and female pattern hair loss.

The appeal of oral minoxidil lies largely in its effect on the hair-growth cycle. In pattern hair loss, follicles gradually miniaturise, producing finer and shorter strands. “Low-dose oral minoxidil can encourage follicles to remain in the active growth phase for longer and may help resting follicles transition back into growth, eventually improving density and thickness,” adds Chhabra.

The mechanism, however, is more complex than the commonly repeated explanation that minoxidil simply increases blood flow to the scalp. “It appears to influence several signals involved in follicle growth and survival, and the exact mechanism is still being studied,” says Chhabra. Some patients may also experience increased shedding during the initial weeks of treatment as older resting hair are replaced by new growing hair. Crucially, minoxidil supports existing follicles; it cannot create new ones or address every cause of hair loss.

MATTER OF CONVENIENCE 

The convenience of a tablet can make oral minoxidil sound like an obvious next step, particularly for those who find topical formulations difficult to use consistently. Topical minoxidil remains the more established starting treatment, acting directly on the scalp with less systemic exposure. Oral minoxidil reaches the follicles through the bloodstream and may be useful for patients with more widespread thinning or those unable to maintain a topical haircare routine.

But convenience does not necessarily mean superiority. “Both oral and topical minoxidil can be effective for hair loss, but one is not automatically better than the other for every patient,” says Chhabra. She points to a 2024 randomised clinical trial in men, which found that oral minoxidil 5mg daily was not superior overall to topical 5 per cent minoxidil twice daily after 24 weeks.

Dr Nirupama Parwanda, dermatologist and Founder of Zolie Skin Clinic, similarly stresses that adherence to a routine is an important part of any long-term hair-loss treatment, although the convenience of an oral medication has to be weighed against the fact that it acts throughout the body.

That distinction becomes particularly important when considering why the hair is thinning in the first place. “Minoxidil may support hair growth, but it will not correct these underlying problems,” says Chhabra. Dr Priyanka Sharma, Co-founder, Director and Chief Dermatologist at V6 Clinics, points out that increased awareness of female hair loss is welcome, but can also lead to oversimplification. “Hair thinning may result from hormonal changes, nutritional deficiencies, thyroid disorders, stress, genetics or scalp conditions, and treatment should address the underlying cause,” she says.

When asked whether oral minoxidil is reserved for men, Chhabra is quick to point out that it can also be prescribed for women with female pattern hair loss, where thinning commonly presents as a widening central parting or a gradual reduction in overall density. “The dose is individualised according to the diagnosis, medical history, treatment goals, and tolerability,” she adds.

The appeal of oral minoxidil lies largely in its effect on the hair-growth cycle…The mechanism, however, is more complex than the commonly repeated explanation that minoxidil simply increases blood flow to the scalp.

For women, one potential side effect can be particularly unwelcome: hypertrichosis, or unwanted facial and body hair. Chhabra adds that the likelihood generally increases with dose. Light-headedness, headaches, palpitations and swelling around the ankles are other possible side effects, warn experts.

THE SAFETY QUESTION 

The appeal of taking a tablet can obscure an important distinction: oral minoxidil is a systemic medication, so its effects extend beyond the scalp. Unlike topical treatments, it requires consideration of dosage, medical history, and individual suitability.

Sharma cautions against viewing low-dose oral minoxidil simply as a harmless “hair-growth pill”. While many appropriately selected patients tolerate it well, she notes that it can affect blood pressure and fluid balance. “It is also generally avoided during pregnancy and breastfeeding,” says Sharma.

As with most treatments that alter the hair-growth cycle, patience is part of the process. Chhabra says early changes may become apparent around three to four months while a more reliable assessment of density and thickness is usually made at around six months. Results can continue to develop with longer treatment as the benefits generally require ongoing use.

Parwanda is equally clear about managing expectations. “There should be no illusions of it being a ‘cure-all’ wonder drug. Its use for hair loss remains off-label, and long-term safety and efficacy continue to be studied,” she cautions.

This article originally appeared in Harper's Bazaar India's August - September 2026 print issue.

Images: Courtesy Getty Images 

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