Oral antibiotics are the standard of care in managing acne that is moderate to severe, resistant to topical therapy and covers large body surface areas. Oral antibiotics that may be prescribed to treat acne include tetracycline, doxycycline, minocycline, erythromycin, trimethoprim-sulfamethoxazole, trimethoprim and azithromycin. Combination therapy (the use of two or more therapies) including oral antibiotics and topical medication (often retinoids) may help treat acne.
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.

Scars (permanent): People who get acne cysts and nodules often see scars when the acne clears. You can prevent these scars. Be sure to see a dermatologist for treatment if you get acne early — between 8 and 12 years old. If someone in your family had acne cysts and nodules, you also should see a dermatologist if you get acne. Treating acne before cysts and nodules appear can prevent scars.
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