Frequently asked questions
Is minoxidil from Kirkland effective?
Yes — it contains 5% minoxidil, the same active ingredient and concentration used in branded treatments like Regaine. Effectiveness comes from the ingredient, not the label on the bottle.
Should you rub in minoxidil or let it sit?
Apply it to the scalp and gently work it in with your fingertips so it reaches the skin rather than sitting on top of the hair. Don't rub hard or massage for long — a light spread is enough. Leave it on for at least four hours before washing.
Is Kirkland minoxidil available in the UK?
Not through Costco UK directly — it's a US Costco brand. We stock genuine Kirkland Signature minoxidil in a UK warehouse and ship it domestically, so there's no import wait or customs charge.
Is Kirkland minoxidil as good as Regaine?
Yes. Both contain 5% minoxidil at the same strength. The difference is price and packaging, not the active ingredient.
What happens after 2 years of minoxidil?
Most people who respond well see their results plateau by then — the regrowth achieved in the first 12 months tends to hold with continued use. Stopping at any point, including after 2 years, usually means gradually losing the hair minoxidil maintained.
Which brand of minoxidil is best?
Any 5% minoxidil product works the same way, since the active ingredient is identical across brands. Kirkland is popular because it's the same strength as pharmacy brands at a lower price.
What are the worst side effects of minoxidil?
Uncommon but serious ones include chest pain, rapid heartbeat, dizziness, and swelling of the hands or feet — these need medical attention if they happen. Far more common are scalp itching, dryness and an initial shedding phase, which are unpleasant but expected.
Can I skip minoxidil for 3 days?
A few missed days won't undo months of progress, but consistency is what makes it work — treat gaps as the exception, not something to plan around.
Does Kirkland minoxidil regrow hair permanently?
No treatment with minoxidil is permanent. It maintains regrowth for as long as you keep using it; stopping leads to gradual shedding of the hair it helped grow back over the following months.
What are the first signs minoxidil is working?
Usually nothing for the first 8-12 weeks, sometimes increased shedding before that — which is a sign it's working, not failing. Genuine new growth, as fine "baby hairs", typically starts becoming visible around month 3-4.
What happens if I stop using minoxidil?
The hair it was maintaining will gradually shed over the following months, and things typically return to where they'd have been without treatment. This is why it's considered a maintenance treatment rather than a cure.