TLDR Certain chemicals and drugs can cause hair loss.
The document reviewed the impact of exogenous chemicals and drugs on hair loss, highlighting that increased hair shedding and thinning were common side effects. It discussed the mechanisms by which chemicals induce hair loss, such as precipitating telogen development or poisoning the anagen root, and the difficulty in proving chemical-induced alopecia. The chapter also covered various types of hair loss, including anagen and telogen, and listed specific chemicals and medications known to cause hair loss, such as antimitotic agents and antithyroid drugs. Additionally, it proposed animal and human assay models to study these effects and emphasized the need for further understanding of the pathobiology of hair follicle responses to chemotherapy.
8 citations
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September 1995 in “Acta Dermato Venereologica” Calcipotriol treatment for scalp psoriasis does not cause hair loss.
147 citations
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April 1994 in “Drug Safety” Some drugs can cause hair loss or increase hair growth, but these effects are usually reversible when the drug is stopped.
6 citations
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July 1975 in “Archives of Dermatology” Rapid weight loss from dieting and hormonal injections can cause significant hair loss in women.
2 citations
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January 2022 
Baldness is often hereditary and linked to male hormones, becoming noticeable when half the hair is lost.
Some treatments like minoxidil, finasteride, and surgery can help with hereditary hair loss.
1 citations
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January 2017 in “Elsevier eBooks” The document concludes that new treatments for hair loss may involve a combination of cosmetics, clinical methods, and genetic approaches.
25 citations
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August 2015 in “Journal of cosmetic dermatology” African American women report more hair issues and use different hair care practices than Caucasian women, and have different hair and scalp characteristics.
July 2013 in “DeckerMed Family Medicine” The document's conclusion cannot be provided because the document is not readable or understandable.
January 2007 in “Strait Pharmaceutical Journal” Water-soluble minoxidil effectively promoted hair growth in mice.
