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Can Propecia lose effectiveness so soon?

Gimme_ShelterJun 17, 2017
I'm using Propecia for 8 and a half months. Massive shed for 1,5 month followed by great regrowth on M.P.B areas. Since the 8 month mark I'm experiencing increased shedding and a lot of bad quality vellus hairs have been seen, especially where the problem lies. Is this just a shedding phase or Propecia is losing ground so soon even if I had great results?

Answers (2)

From board-certified doctors and trusted medical professionals
Dr. Sean Behnam, MD
Board Certified Hair Restoration Surgeon
Answered on Jun 20, 2017
Answer
Dr. Jeff Donovan, MD, PhD
Certified Dermatologist
Answered on Jun 18, 2017
Answer

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Jeff Donovan, MD, PhD

Is losing thinner tapered hairs (4.5-5cm) a characteristic of telogen effluvium?No, this so called intermediate hair is somewhat non specific. It does not necessarily mean a person has a telogen effluvium. Androgenetic alopecia needs to be excluded as well as a few other causes. 

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Jeff Donovan, MD, PhD

Yes, they do. There is really no such entity as a telogen effluvium hair. The proper terminology would be "a telogen hair obtained from a person who is experiencing a telogen effluvium." Hairs that are shed in androgenetic alopecia are telogen hairs. Hairs that are shed in a telogen effluvium a...

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Ilhan Serdaroglu, MD

It is natural for human to lose daily 5-100 hair shaft in telogen phase, and it is an expected outcome of hair cycle. These hairs appear again and grow back. About 10% of all hair on our heads is in the telogen phase.

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