“Both Botox and Dysport are excellent options for someone dealing with hyperhidrosis,” says Peterson Pierre, MD, dermatologist in Thousand Oaks, California.

So is one better than the other? Per a study in the Journal of Drugs in Dermatology, Botox and Dysport are similarly effective, with Botox just barely taking the edge over Dysport.

For the study, a patient was treated with 100 units of Botox on the left side of their face and 300 units of Dysport on the right side, without knowing which was which. Botox kicked in quicker, with the patient noticing a reduction in sweating after one week on the left side of their face. Dysport, on the other hand, took about two weeks to take effect.

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