Do the effects of Botox wear off sooner in younger patients?

Botox typically lasts 3-4 months.  If botox is used continuously for several cycles, it may seem that it lasts longer before full return of facial animation.  This is probably due to the atrophy of the continuously paralyzed muscles which may be weaker when the effect of the chemodenervation from botox wears off.  The muscles will begin working again, but will be weaker and take longer to hypertrophy to their baseline strength.  

I have found that botox results do last less in those who are more expressive, workout a lot, or use the muscles spontaneously often.  This has not been reported however.  Best, Dr. Emer.

Botox effect should last for 3 to 4 months in patients of any age. Elderly, middle age and young adult patients should all have similar duration of effect when Botox applied similarly.

Thank you for sharing your interesting question. The duration of results following Botox injections is not related to a person's age. Most people see results lasting up to 4 months. With repeat injections for years, the effects of Botox will last longer. I hope you find this helpful.Good luck,

Thank you for your question. Botox should last approximately 3 months on all patients, no matter the age. All the best,