What are the side effects of botox and dysport?

Botox and Dysport have excellent safety profiles especially when used for cosmetic purposes.  The most common side effect is eyelid ptosis or eyelid drooping. This happens rarely and occurs when the medication diffuses into the muscles that hold the eyelid up.  It can be treated with a prescription eyedrop and will resolve in a couple of weeks. Remember that injection technique is very important with Botox and Dysport. In other words you will get the best results with the fewest side effects from the most experienced injectors.

The most common side effect is some slight bruising at the site of the injections, and (rarely) some people develop a headache afterward. A more serious complication of Botox injections can be ptosis, when the eyebrow and eyelid droop. This can happen when the skin is too lax or when the muscles right above the brow or the ones between them are injected. Often a slight one- or two-millimeter drop reverses within two weeks, but unfortunately the effect can last as long as the Botox results and there's no way to reverse it. There's a long list of potential side effects you should be aware of before consenting to this procedure, but most of them are extremely rare.

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