Question 1

Does Regaine work by increasing blood flow?

Accepted Answer

Yes, partly. It dilates scalp blood vessels, improving oxygen and nutrient delivery to follicles. However, its main action is direct stimulation of dermal papilla cells via potassium channel opening.

Question 2

Why does Regaine cause temporary hair shedding?

Accepted Answer

This “shed phase” happens because Regaine pushes resting (telogen) hairs out to make way for new anagen hairs. It’s a sign the medicine is working and subsides after a few weeks.

Question 3

Can I use Regaine if I have high blood pressure?

Accepted Answer

Topical Regaine is generally safe, but if you have uncontrolled hypertension or take antihypertensives, consult your doctor first. Systemic absorption is low but could theoretically add to vasodilation.

Question 4

What happens if I stop using Regaine?

Accepted Answer

Within 3‑4 months, most people lose the hair they regrew and return to their original pattern of hair loss. Regaine must be used continuously to maintain benefits.