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OTC topical analgesics In the U.S., the Food and Drug Administration (FDA), regulates the concentration of each active ingredient that can be formulated in non-prescription products, also called over-the-counter (OTC) products. The commonly used OTC topical anesthetics belong to the "caine" family and will contain no more than a specific maximum concentration for the active ingredient. The limitation for active ingredients reflects the relative potency of the drugs. As an example, the maximum concentration set for lidocaine is 4%, while benzocaine preparations have a maximum concentration of 20%. Caine mixes, or combinations of caine products within a preparation, also have set maximum concentrations. So, the analgesic effect of preparations is used to set whether the sale of a product is controlled by prescription. As an example, EMLA cream, which contains a combination of lidocaine (2.5%) and prilocaine (2.5%) is a prescription product. EMLA cream, with its combination of these two analgesics, produces a greater analgesic effect than similar non-prescription products. However, EMLA cream is still a very weak anesthetic and has little to offer when compared to alternative physician prescribed compounded medication. While electrologists have no allowance for the purchase of more potent medication than is available to the general public, specialized non-prescription analgesic products are made available through electrology trade suppliers and vendors. Your electrologist will likely be the best source of non-prescription topical analgesics. The following list represents some of the items made available to the electrology trade:
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