Every doctor has a favourite formula or product they like to use. We use Teosyal Kiss.
You shouldn't exercise the day of the procedure. You especially should avoid activities that increase blood flow to your face, like getting a massage or a facial.
There's very little downtime. The procedure takes about 15 to 20 minutes total and the numbing will start to wear off after about 15 minutes. You can go about your daily life afterward but shouldn't make any big plans (like a wedding or an important event) for at least three days in case you bruise.
If done correctly, lips with injections don't feel any different than real lips. Not even when you're kissing.
Natural is Best
Don't expect to get Angelina Jolie's lips. You can bring in inspiration photos, but ultimately, you and Dr. Kelleher should decide what look is best for your face. You should also expect to increase the size gradually over time — not all at once — for the most natural results.