The product is injected intradermally and blocks the release of acetylcholine, the messenger the nerve endings use to instruct the sweat glands. The gland receives no signal, so almost no sweat is produced in the treated area. Three things are worth knowing:
- The effect is local and limited to the injected zone;
- Overall thermoregulation is not affected: the underarms account for only a small share of total sweating;
- The effect is reversible: after several months the nerve endings restore their connection with the glands.