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In general Rogaine is well tolerated.
The dermatologic events were of similar type and severity
in the 5% and 2% groups. Most frequently reported adverse
reactions with 2% and 5% topical minoxidil in commercial marketing
experience are dermatological reactions and include: local
erythema, itching, and dry skin/scalp flaking, skin irritation,
rash, and dermatitis. Increased hair shedding can occur due
to minoxidil's action of shifting hairs in the resting telogen
phase to the growing anagen phase ( old hairs fall out as
new hairs grow in their place ). This temporary increase in
shedding generally occurs two to six weeks after beginning
treatment and subsides within a couple of weeks ( first sign
of action of minoxidil ).
Rare cases of hypotension have been reported.
Rare cases of hypertrichosis ( unwanted non-scalp hair including
facial hair growth in women ) upon initiation of therapy with
Rogaine have been reported.
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