How strong of a pain reliever can I (or my electrologist) purchase without a prescription?
The drugs in topical pain relievers usually fall into the “caine” family. The percentage of the drug allowed by law (for non-prescription sale) is set relative to its effect. As an example, lidocaine, with moderate anesthetic properties is limited to 4 percent, but benzocaine, with very weak analgesic properties can contain up to a 20 percent concentration. Both will produce relatively the same effect.
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