, previously known as botulinum toxin type A
) is a prescription medication approved for several uses, including improving the appearance of facial lines. In studies that evaluated the results of Botox, the medicine was shown to be extremely effective.
In studies, up to 82 percent of people who received injections saw significant improvement in their frown lines between the eyebrows one week afterwards, compared to just 9 percent who had received placebo injections (with no active ingredients). This effect lasted for at least 60 days, after which time the effects appeared to gradually decrease. Studies have also shown Botox to be effective for reducing crow's feet.
For cervical dystonia (muscle spasms of the head and neck), studies showed that Botox injections
help relieve neck pain and abnormal head positioning, compared to placebo injections. In most people, the beneficial effects were gone after about three months.
Studies of Botox for severe underarm sweating showed that up to 86 percent of people who received injections decreased their sweat production by 50 percent or more, compared to up to 45 percent of people receiving placebo injections. The beneficial effects lasted an average of 200 days.
Studies have also shown that Botox can improve eyelid twitching or spasms (blepharospasm) and misaligned eyes (strabismus) caused by abnormal muscle contractions
Studies have shown that Botox can decrease urine accidents in people with neurologic bladder problems
and in people with overactive bladder
, and can decrease the frequency of urination in people with overactive bladder.
(Click Botox to learn more about how the medication works and to find out what side effects may occur with this drug.)