Weakness after palm botox injection. What's your recommendation?

I am assuming that you had Botox to treat hyperhydrosis in the hands. Weakness of the muscles can occur, obviously. Sadly, not much you can do but wait it out. It will resolve as the Botox wears off. This could be in as little as 10 days or it could take longer. I'm sorry that you are experiencing this. 

Hi there,
I will presume that you have had injections to your palms for the purposes of controlling excess sweating, or hyperhidrosis, in your hands. Weakness in the hands after a procedure such as this can occur, and is related to the effect of the toxin on the intrinsic muscles of the hands which perform fine motor functions.  
Toxin treatment of the hands should always be exercised with caution in those who use their hands for their job, as this can be affected.  As the effect is already present, however, the extent and duration will vary depending on the number of units used and how profound the weakness is.  The less the number of units used, the more likely it is that the effects will be transient.  Hands are used on a daily basis, and use of the muscles will gradually bring back the function fully.  Toxins wear off over time, and this is not something that will stay long term - please be reassured.  However, I would advise your treating physician of the incident in order to allow them to document it and consult with you to advise you further.  
Hop this helps!
Best,
MJ x

Some of the Botox did get into the muscles of the hand and that will cause weakness but will wear off in a matter of 10 days or so. there is no way to reverse the effect but it will go away

weakness of some muscles of the hand can occur after treatment using BOTOX for hyperhidrosis. Whatever happens already happened, but I would still go see your treating physician and let them be aware of your situation. The weakness will eventually go away but it may take weeks to months. 
Good luck from New York City

Botox into the sweatglands of the palm and fingers can drift deeper into the muscle tissues.  It will take time to improve.  Smaller doses in the hand such as 50 units will recover faster.  100 or 105 units could take longer.  Not all the Botox went into the muscles, only a small amount drifted there.Botox maxes at two weeks and then improves.