Retinoids là thuốc có nguồn gốc từ vitamin A. Retinoids là comedolytic, điều đó có nghĩa rằng họ làm việc bằng cách làm cho da đổ dễ dàng hơn để cắm nang không xây dựng và hình thành mụn đầu đen và mụn đầu trắng. | 104 Part III Turning to the Pros to Treat Your Type of Acne Retinoids are medications that are derived from vitamin A. Retinoids are comedolytic which means that they work by making the skin shed more easily so that follicular plugs don t build up and form blackheads and whiteheads. In addition to helping you shed your skin retinoids Indirectly limit the formation of inflammatory lesions by preventing comedones. After all if comedones don t ever form they can t become big inflamed pustules and papules. Appear to discourage P. acnes the bacterial invaders associated with acne growth. Promote the shedding of skin which enhances the penetration of other topical anti-acne agents. Help to plump up the skin and make enlarged pores follicular prominence in dermatologist speak less obvious. -jjUBEfl Several brand-name topical retinoids as well as generic preparations are on the market check out Table 9-1 for information on ÌỈ0 which brand-name retinoids contain which active ingredient and read the sidebar in this chapter to get a handle on what a branded generic is . Many studies have been performed on the topical retinoids and the results don t clearly favor the use of one preparation over another. Individuals vary in their response to these agents and possible side effects so you and your doctor will work together to find the best prescription for you. Generic versus branded generic drugs It s a tricky business trying to find cheaper drugs. When a famous drug such as Retin-A has its patent expire it can then become a generic unbranded drug. As an example once a brand becomes generic the original company often ceases to promote or support it. Sometimes this can be a real benefit because the generic version tends to be considerably cheaper. Hurray But after a while some generic companies come along and obtain approval from the FDA to manufacture the drug and they put the original brand name on it. When that happens the branded generic price becomes higher than the generic
