TLDR Laser treatment successfully removed unwanted facial hair caused by minoxidil.
The study investigated the effectiveness of long-pulsed Nd:YAG laser treatment for facial hypertrichosis in patients undergoing topical minoxidil therapy. The research was conducted by the Dermatology Department at Habib Thameur Hospital in Tunis, Tunisia. The findings suggested that the combination of Nd:YAG laser and minoxidil therapy could be beneficial in managing facial hypertrichosis, providing a potential treatment option for patients experiencing excessive facial hair growth.
244 citations,
January 2010 in “Journal of the American Academy of Dermatology” The document says current treatments for alopecia areata do not cure or prevent it, and it's hard to judge their effectiveness due to spontaneous remission and lack of studies.
63 citations,
May 2003 in “Journal of The European Academy of Dermatology and Venereology” Minoxidil use increases facial hair growth in females, more in older users.
44 citations,
January 1997 in “British Journal of Dermatology” 
34 citations,
January 1987 in “Dermatology” Topical minoxidil effectively and safely treats extensive alopecia areata but doesn't change its course.
19 citations,
December 1985 in “Journal of The American Academy of Dermatology” Minoxidil can cause scalp comedones and acne.
80 citations,
October 1983 in “BMJ” Minoxidil helps hair regrowth in alopecia patients, with 16 having good results and no side effects.
January 2014 in “DOAJ (DOAJ: Directory of Open Access Journals)” Minoxidil can effectively treat patchy hair loss by stimulating hair growth.
20 citations,
March 1994 in “Clinical and Experimental Dermatology” Too much topical minoxidil can cause excessive hair growth, but stopping treatment reverses it.
45 citations,
November 1979 in “British Journal of Dermatology” Minoxidil causes excessive hair growth in almost all patients.
