How long does the effect of botulinum toxin A last in the treatment of hyperhidrosis? The effect of botulinum toxin A usually lasts around 6-12 months, depending on individual factors. From drkish@drkish.ch|2024-08-08T11:23:34+02:00August8, 2024|Heavy Sweating|0 Comments Share This Story, Choose Your Platform! FacebookXRedditLinkedInWhatsAppTelegramTumblrPinterestVkXinge-mail