Combination therapy—using medications of different classes together, each with a different mechanism of action—has been demonstrated to be a more efficacious approach to acne treatment than monotherapy. The use of topical benzoyl peroxide and antibiotics together has been shown to be more effective than antibiotics alone. Similarly, using a topical retinoid with an antibiotic clears acne lesions faster than the use of antibiotics alone. Frequently used combinations include the following: antibiotic and benzoyl peroxide, antibiotic and topical retinoid, or topical retinoid and benzoyl peroxide. The pairing of benzoyl peroxide with a retinoid is preferred over the combination of a topical antibiotic with a retinoid since both regimens are effective but benzoyl peroxide does not lead to antibiotic resistance.
When whiteheads and blackheads become infected with bacteria, called Propionibacterium acnes, it leads to inflammatory acne. Regular bacteria is found in most whiteheads and blackheads, but P. acnes is attracted to the closed, oily environment. This bacteria makes acne more difficult to treat. The four different pimple types that characterize inflammatory acne are papules, pustules, nodules and cysts.
Spironolactone has relatively minor side effects, like low appetite, weakness, or cramping, but there’s one major exception: spironolactone comes with a black box warning about its cancer-causing effects. The FDA is required to include this label based on a study conducted in the 1950s that found carcinogenic properties in the spironolactone given to rats in an experiment. However, the dose of spironolactone used in this study was nearly 500 times higher than the dose currently prescribed, and no studies since have found anything carcinogenic about spironolactone. Because of this, most dermatologists feel comfortable prescribing spironolactone for acne. Still, it’s something to be aware of before you take it. Additionally, those with low blood pressure or kidney conditions are likely not good candidates for spironolactone and may want to explore other acne treatment options.
In terms of their effectiveness, both these ingredients are beneficial. Any related product worth its salt will have either one of these in their formula. In fact, some products incorporate both. However, in saying this, our research has provided conclusive proof that salicylic acid is the one to choose. Below are the main points as to why we think this is the case:
“Sometimes I see people try over-the-counter products just for a couple of weeks, they get frustrated, they say it’s not working, and they discontinue them,” Arthur says. “But it really does take a while to see the effectiveness. So unless you’re having a problem with the medication, like it’s causing severe irritation or dryness, it’s recommended to give it at least 2-3 months before switching to something else.”
Benzoyl peroxide (BPO) is a first-line treatment for mild and moderate acne due to its effectiveness and mild side-effects (mainly skin irritation). In the skin follicle, benzoyl peroxide kills P. acnes by oxidizing its proteins through the formation of oxygen free radicals and benzoic acid. These free radicals are thought to interfere with the bacterium's metabolism and ability to make proteins. Additionally, benzoyl peroxide is mildly effective at breaking down comedones and inhibiting inflammation. Benzoyl peroxide may be paired with a topical antibiotic or retinoid such as benzoyl peroxide/clindamycin and benzoyl peroxide/adapalene, respectively.
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What it is: Originally under the brand name "Accutane" but now available only in generic form, isotretinoin is a derivative of vitamin A taken in pill form for 15-20 weeks. Doctors normally prescribe it for people with "severe nodular acne" that does not respond to other treatments. Nodules are inflammatory lesions with a diameter of 5mm or more. A single course of 15-20 weeks has been shown to result in complete clearing and long-term remission of acne in many people.1-2 Learn more on the Accutane page of acne.org.
Acne appears when a pore in our skin clogs. This clog begins with dead skin cells. Normally, dead skin cells rise to surface of the pore, and the body sheds the cells. When the body starts to make lots of sebum (see-bum), oil that keeps our skin from drying out, the dead skin cells can stick together inside the pore. Instead of rising to the surface, the cells become trapped inside the pore.