What would happen if a large dose of botox were injected and absorbed systemically?

Botox is an option for those who don't want to get a surgery, but when it's not applied by professionals it may bring worse consequences immediately, a large amount applied is going to freeze part of the face where it was inyected, and would give a rare unnatural look besides the pain it causes in the zone, because it works directly in the muscles, the person has to wait several weeks, or months until the body absorves the botox and the face could go back to its normal look. Botox freezes the muscle activity and avoid wrinkles formation or expression lines for about 5 or 6 months.