Encyclopedia · drug with hair side effects
Statins (simvastatin, simvastatin plus ezetimibe)
A cholesterol-pill combination regrew hair in a few dramatic alopecia areata case reports, then mostly failed in the open studies that followed; nothing shows topical statins help ordinary balding.
What it is
Simvastatin is a prescription cholesterol drug; ezetimibe blocks cholesterol absorption. The tablet combination is sold as Vytorin or Inegy. Hair use is off-label.
How it works
Follicles need balanced cholesterol production. Mice lacking Insig in skin pile up cholesterol precursors and fail to cycle hair; topical simvastatin lowered the precursors and corrected the defect. Evers 2010 Statins are also proposed to calm the immune system, the rationale for alopecia areata. In a lab study, simvastatin pushed follicle stem cells toward keratinocytes. Babakhani 2019
What the studies show
- One person with alopecia universalis had dense scalp hair a month after adding ezetimibe 10 mg to simvastatin 40 mg; two years of simvastatin alone had done nothing. Robins 2007
- Two more refractory cases benefited, with continued steroid injections. Ali 2010
- In an open study of 14 people, 4 (28.6%) were responders with 30-80% regrowth after 3 months. Choi 2017
- In 12 patients, 67% had no regrowth, 24% had muscle pain, and the authors judged it ineffective. Freitas Gouveia 2017
- A phase 1 trial (NCT01520077, 29 people) was completed in 2015; we could not read its results. Several other letters gave no usable numbers.
- No topical statin trial for pattern hair loss was found (2026-10-10). Recent topical ointments were used in rare genetic cholesterol-pathway disorders, with minimal reported hair outcome.
How it's used in studies
Oral simvastatin 40 mg plus ezetimibe 10 mg daily in the alopecia areata series. Topical forms in the genetic-disease reports were compounded ointments.
Side effects and safety
Muscle pain in 24% in one series. Statins are prescription drugs with liver and muscle risks and are avoided in pregnancy.
Bottom line
Conflicting, uncontrolled evidence for alopecia areata and nothing for pattern baldness. JAK inhibitors have far stronger evidence (see tofacitinib and ruxolitinib). Discuss with a doctor.
Fun facts
- Hair regrew in some "incurable" alopecia universalis cases after a cholesterol pill, but when more patients were tested the effect mostly vanished.
Studies 6
Evers BM et al. Hair growth defects in Insig-deficient mice caused by cholesterol precursor accumulation and reversed by simvastatin. J Invest Dermatol. 2010
Tested: topical simvastatin
Result: Corrected hair-growth defects caused by cholesterol precursor build-up.
Read the study ↗Robins DN. Alopecia universalis: hair growth following initiation of simvastatin and ezetimibe therapy. J Drugs Dermatol. 2007
Result: Dense scalp hair a month after adding ezetimibe 10 mg to simvastatin 40 mg; two years of simvastatin alone had done nothing.
Read the study ↗Ali A, Martin JM. Hair growth in patients with alopecia areata totalis after treatment with simvastatin and ezetimibe. J Drugs Dermatol. 2010
Result: Refractory alopecia benefited, with continued steroid injections.
Read the study ↗Choi JW et al. Simvastatin/ezetimibe therapy for recalcitrant alopecia areata: an open prospective study. Ann Dermatol. 2017
Result: 4 of 14 (28.6%) were responders with 30-80% regrowth.
Read the study ↗Freitas Gouveia M, Trueb RM. Unsuccessful treatment of alopecia areata with simvastatin/ezetimibe. Skin Appendage Disord. 2017
Result: 67% had no regrowth and 24% had muscle pain; authors judged it ineffective.
Read the study ↗Babakhani A et al. In vitro differentiation of hair follicle stem cell into keratinocyte by simvastatin. Iran Biomed J. 2019
Result: Simvastatin 5 micromolar pushed follicle stem cells toward keratinocytes in culture.
Read the study ↗Related
- LuteolinA plant flavonoid sold as a supplement slowed hair graying in a mouse model while two similar antioxidants did not, and there is no human data at all.
- RuxolitinibThe JAK1/2 blocker whose first use in three alopecia areata patients in 2014 launched the JAK era for hair; the pill regrows hair in small studies while the cream failed.
- TofacitinibThe first JAK inhibitor used off-label for alopecia areata; about a third to two thirds of patients regrow hair in open-label studies, but most relapse within months of stopping.