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I Was Told HQ4% is Not Safe for Long Term Use, is That True?

BSJ
I was told that HQ4% could cause skin cancer if we used it for long term. Thus, we can only use it for short term. Is this true? What is the best way and best period to use HQ4% with Retin-A? Can we use these two things the same time?

Answers (3)

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Dr. Lawrence Kass, MD
Oculoplastic Surgeon, Board Certified in Ophthalmology
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Dr. Kristina Tansavatdi, MD
Board Certified Facial Plastic Surgeon
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Dr. F. Victor Rueckl, MD (in memoriam)
Board Certified Dermatologist
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