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Article
May 1971

PITYRIASIS RUBRA PILARIS

Author Affiliations

9985 Sierra Ave Fontana, Calif 92335

Arch Dermatol. 1971;103(5):563. doi:10.1001/archderm.1971.04000170097024
Abstract

To the Editor.—  Regarding "Pityriasis Rubra Pilaris: Prolonged Treatment With Methotrexate" by Knowles and Chernosky in the Archives (102:603. 1970), and in view of some work I have done with vitamin A and reported cases of successful therapy with vitamin A, I would like to make these comments.

  1. Reported success of treatment in some cases of pityriasis rubra pilaris (PRP) with vitamin A suggests that it can help, possibly acting as an antimetabolite.

  2. Failures with vitamin A therapy suggest a metabolic disorder of vitamin A metabolism or improper dosage. In my communication, "Treatment of Ichthyosis,"1 I reported excellent results in ichthyosis hystrix by using two adjuvants to increase vitamin A absorption and utilization, neostigmine (Prostigmin) to increase bowel activity, and bile salts to promote absorption. This has not been noted since attention was paid only to the salt therapy that I described.

In Knowles and Chernosky's

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