This is a question that I answered for someone who had a procedure by another physician.

This is directed to a question regarding botox that caused her mouth to droop and how long it will last. The person also had a history of bells palsy.

Botox typically lasts anywhere from 3-6 months. Although certain high movement areas are more likely to get better faster, your current situation could last up to or longer than 3 months.

The key is knowing the particular person’s state. People with Bell’s palsy are likely to react to Botox more than someone who doesn’t have this. The reason for this is that people with Bell’s Palsy have lost some functioning nerves from the condition and hence when it comes to a neurotoxin they are going to be more sensitive to Botox’s effects.

In this situation, you have to start at a much lower dose and have the patient come back in 2 weeks to see what the effects are. Botox typically starts to work at 4 days and has its maximum effect at 2 weeks.