TLDR Minoxidil use in children may cause heart issues.
The study reports three cases of children with alopecia areata who experienced cardiovascular side effects after using topical minoxidil solution 2%. The absorption of minoxidil in children may be influenced by variable parameters, including age, and may cause systemic side effects. The authors suggest that future studies should be performed to evaluate the topical use of minoxidil and to determine the mechanism of absorption, quantity of drug absorbed, as well as side effects in children and other special groups of patients, such as those with cardiovascular diseases, in order to ensure the safety of its use.
Cited in this study
4 / 4 results
29 citations
,
December 2003 in “Teratology” Minoxidil use during pregnancy may cause fetal harm.
15 citations
,
January 2000 in “Japanese Heart Journal” A man developed heart problems after using a baldness treatment for 4 months, suggesting that people with heart issues should avoid this treatment.
45 citations
,
October 1988 in “British Journal of Clinical Pharmacology” Using topical minoxidil for baldness can cause heart problems, especially in those with heart disease.
17 citations
,
March 1985 in “Journal of The American Academy of Dermatology” Minoxidil can lower blood pressure in some people.
3 citations
,
January 2018 A woman had an unusual allergic reaction to a hair loss treatment, which cleared up after stopping the treatment and using a different medication.
January 2014 in “DOAJ (DOAJ: Directory of Open Access Journals)” 
16 citations
,
April 1984 in “Archives of Dermatology” Topical minoxidil can help hair regrowth in alopecia areata patients, but maintaining the growth after stopping treatment is inconsistent.
