Tazorac and Tretinoin are both topical retinoids used to treat acne. One is not "superior" to the other as the choice of a topical retinoid is made on an individual basis when a dermatologist evaluates a patient's skin. Some patients are better suited for the "stronger" Tazorac while others will respond better to a "milder" retinoid like Tretinoin.
Both of these medications come in .05% strength, not .5%! Both are topical retinoids. In general, samples are given of both products to see which one patients will tolerate better. Gels vs. cream formulas will also make a difference, with creams being generally tolerated better.
