Hello! Our nurse injector reviewed your question and states you do not have to take arnica when getting injections, but some people choose to use it as a way to help reduce bruising, swelling, or discomfort afterward. Arnica is a homeopathic remedy that’s commonly taken before and after cosmetic procedures, such as Botox or dermal fillers, in hopes of minimizing inflammation and bruising. It comes in several forms, including oral tablets and topical gels or creams. While many people report benefits, scientific evidence supporting arnica’s effectiveness is limited, and it may not work the same for everyone. Additionally, oral arnica—especially in high doses—can interact with certain medications or cause side effects, so it’s important to check with your doctor if you have any underlying health conditions or are taking blood thinners. In general, arnica is optional and not medically necessary for injections. Instead, most healthcare providers recommend avoiding alcohol, aspirin, and NSAIDs for a day or two before your appointment and applying a cold compress afterward to help reduce swelling and bruising. If you’ve used arnica in the past without any issues and found it helpful, it may be fine to continue, but it’s not required.