Botox for Orbicularis Oris Muscle?

Unfortunately, there will be a very fine line between the amount needed for flattening the muscle and the amount of Botox that might cause your lip to droop giving you an unwanted smile irregularity, drooling, speech problems and asymmetry.

Botox can be used for vertical lip lines, but isn't always the best idea; I personally prefer hyaluronic acid based fillers like Juvederm. Since the orbicularis oris muscle is necessary for pursing, and other functions of the mouth, too much Botox can lead to drooling and problems with oral continence. I have never seen Botox used to create selective atrophy of this muscle and would not suggest it.

Botox(R) can be used for the orbicularis oris muscle. This is the muscle that encircles the lips and is predominantly responsible for pursing the lips, whistling, kissing and some of the function related to smiling. Nonetheless, one of the most common concerns about the lips is that of vertical lines, or "smoker's" lines. Small doses of Botox(R) delivered into the wrinkles can achieve some good reduction of the vertical lines when done by an experienced cosmetic physician. It is... more

 Sorry Fanny. I have never heard of anyone using Botox in the orbicularis oris muscle to decrease the bulk of the lip. I do not think that it would work and would not recommend it. You would likely need a fair amount of Botox, which will alter your ability to smile, etc.

Injecting botox around the mouth may not be teh best solution for you to reduce the volumeof the upper lip.  A fornal exam would be important and an evaluation of your bony architecture as well as soft tissue architecture would be important.

Lip lines are best treated with fillers and peels if needed.  I would definitely not use Botox for the concern you are demonstrating in the picture.

In this particular area, Botox is most useful for minimizing radial lip lines (lipstick bleeding lines). However, it is not commonly used for debulking or decreasing the size of the lips.