While injectables are minimally invasive and can be done in minutes, there are important things to keep in mind pre- and post-appointment. Botulinum toxin injections are a true lunchtime procedure: There’s nothing you need to do beforehand, and the only restrictions afterward are not exercising or putting your head down for about four hours. Try to avoid icing the injection site; while it used to be common practice, new research shows that it can slow the uptake of the toxin in the muscle. In other words, it won’t work as well.
Fillers are a different story. Because bruising and swelling are the most common side effects, especially in sensitive areas like the lips, schedule appointments at least 48 hours before any major event. Bowe also suggests that you stop taking aspirin, Aleve, Advil, Motrin, and fish-oil supplements two weeks prior to getting a hyaluronic acid filler, since all are blood thinners that can increase the likelihood of bruising and swelling. And—file this under “strange but true”—never book your annual dental checkup right after getting a filler. “When your teeth are cleaned, a ton of bacteria is released into your mouth and travels into the bloodstream. Fillers are considered an implant, a foreign substance in the body, and this excess bacteria ups the risk of infection,” says Shamban.
6. How long the results will last.
Multiple factors affect the longevity of the results: the product used, how much was injected, where it was put in the face. As a general guideline, botulinum toxin lasts around four to six months, while hyaluronic acid fillers last anywhere from six to 18 months. So if you like the results, be prepared to make this another part of your beauty routine that will require some upkeep. And if you don’t like the results, keep in mind that hyaluronic acid fillers are reversible: An enzyme can be injected that will dissolve the filler within 24 hours. Toxin is not, however, so it’s always better to ask for less and add more later. Bowe says it’s common practice for injectors to have their first-time clients come back two weeks after their injection to reassess the results and touch up with more if needed (at no extra cost).