You might experience: mild headache, migraine on the day of the treatment or even flu like symptoms (rare). If you have any of the above symptoms you can take Tylenol or advil Sensation of heaviness of the forehead A few weeks after, you can have dry mouth (if injected in the lower face or neck) The medication is in full effect around 2 weeks after the injection You are injected in the lower face you will experience difficulties drinking through a straw or whistling Don’t book any treatment right before a special event (like party, social gathering, work meeting, etc.) you might bruise for a few days. Ideally book your treatment at least 2 weeks before the event