Two major risks are attributed to botox injection. The first is the risk of injecting botox to the wrong muscle group and second is allergic reaction towards botox and its chemical components. There is also a risk of the toxin to spread away from the target injection site which can cause several symptoms like muscle weakness, double vision, hoarseness of voice, and blurred vision. Adverse reactions right after a botox injection include drowsiness, headache, dry mouth, fatigue, and flu-like symptoms. Redness, swelling, and bruising at the injection site are common but it is not an effect of the drug but rather results from the mode of administration. These effects are considered to be minor and temporary that will wear off after about six weeks.
