Ingredient Dictionary

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Accutane

Trade name for the drug with the active ingredient isotretinoin. Acutane as a brand name is no... Read More »

Categories: Prescription Drugs, Vitamins

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adapalene

See Differin , retinoids

Categories: Prescription Drugs

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all-trans retinoic acid

Active ingredient in Retin-A and Renova. Read More »

Categories: Cell-Communicating Ingredients, Prescription Drugs

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aminophylline

Pharmaceutical ingredient present in prescription bronchodilators (medications designed to open... Read More »

Categories: Prescription Drugs

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azelaic acid

Trade name Azelex and available by prescription; a component of grains such as wheat, rye, and... Read More »

Categories: Prescription Drugs

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Azelex

See azelaic acid

Categories: Prescription Drugs

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bimatoprost

The active ingredient in the glaucoma medication Lumigan that was found to also stimulate lash... Read More »

Categories: Prescription Drugs

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Differin

Differin (also called adapalene) is a retinoid, a form of vitamin A that has been shown in clinical... Read More »

Categories: Prescription Drugs

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hydroquinone

Strong inhibitor of melanin production that has long been established as the most effective... Read More »

Categories: Prescription Drugs, Cell-Communicating Ingredients, Antioxidants

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isotretinoin

Anti-acne drug that’s derived from vitamin A. This drug works by essentially stopping oil... Read More »

Categories: Prescription Drugs, Cell-Communicating Ingredients, Vitamins

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Latisse

Brand name for the prescription drug whose active ingredient is the prostaglandin analogue... Read More »

Categories: Prescription Drugs

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Ortho Tri-Cyclen

Low-dosage birth-control pills (generic norgestimate/ethinyl estradiol) approved for use in the... Read More »

Categories: Prescription Drugs

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progesterone USP

Female sex hormone secreted by the body but capable of being manufactured in a lab setting. Use of... Read More »

Categories: Miscellaneous, Prescription Drugs

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Renova

See Retin-A , tretinoin

Categories: Vitamins, Prescription Drugs, Cell-Communicating Ingredients

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Retin-A

One of several prescription-only drugs (others include Renova, Retin-A Micro, and Avita) that... Read More »

Categories: Vitamins, Cell-Communicating Ingredients, Prescription Drugs

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retinoids

Large group of over 2,500 chemicals related to vitamin A. Topical, over-the-counter retinoids... Read More »

Categories: Vitamins, Cell-Communicating Ingredients, Prescription Drugs

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Tazorac

Chemically known as tazarotene, it is a synthetically derived retinoid with properties similar to... Read More »

Categories: Anti-Irritants, Prescription Drugs

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tretinoin

Topical, prescription-only medication that can improve skin cell maturation after skin has been... Read More »

Categories: Antibacterial/Anti-Acne, Prescription Drugs, Cell-Communicating Ingredients

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About the Experts

Paula Begoun is the best-selling author of 20 books on skin care and makeup. She is known worldwide as the Cosmetics Cop and creator of Paula's Choice. Paula's expertise has led to hundreds of appearances on national and international television including:

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The Paula's Choice Research Team is dedicated to helping you find the absolute best products for your skin, using research-based criteria to review beauty products from an honest, balanced perspective. Each member of the team was personally trained by Paula herself.

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