Instead of going with the typical approach of treating the whole face evenly, she took a more eye-opening route. She injected Botox into just one half of her face to clearly show the effects of the treatment in real time.
So yes — only one side of her face received Botox while the other side was left completely untreated. And to top it off, she documented the entire process and shared the dramatic results online.

Exactly two weeks before her now-viral post, Dr. Farrell injected Botox into the lower muscles on the right side of her face. This included the DAO, which is the muscle responsible for pulling down the corners of your mouth, and the platysma, which impacts expressions and mouth movement.
“Now for you, two weeks later, I present my results as I try and contract my lower face muscles.” she shared with her followers during the video update.
The difference it made was pretty shocking.

Then, gesturing toward her right side, which had been treated, she added with effort: “I’m really trying to pull this side!”
“When the muscles that pull the lower face down (platysma and DAO) are injected and relaxed with a Neuromodulator such as Botox, the muscle that pulls the mid face up (zygomaticus or cheek muscle) dominates and pulls the face up!”
She also mentioned that the results usually stick around for about three to four months. Plus, they can be achieved using any neuromodulator that’s been approved by the FDA.
And no, she didn’t plan to walk around with an uneven face for the long haul — that was never the intention.
One user wrote: “This is so educational and you are AMAZING!”
And finally, someone summed it up perfectly: “This is an amazing demonstration of the effects of Botox. It really is amazing! Thanks for doing this. I am actually shocked to see how big of a difference it makes.”