Common side effects of Botox include inadequate effectiveness, asymmetrical muscle paralysis, drooping eyelids, minor bruising or swelling at the injection site, or, rarely, flu-like symptoms. Pregnant or lactating women and individuals with a history of allergic reactions to Botox should avoid its use. Additionally, it's important to remember that:

“If a small dose proves insufficient, additional doses can always be administered, whereas the effects of high doses will only diminish after several months.”