Taken from Dr. Koop. com
(HealthDay News) -- Botox is a compound, derived from a bacterium, that is injected through the skin and into facial muscles to reduce lines and wrinkles. If you're thinking about getting Botox injections for cosmetic improvement, the U.S. Food and Drug Administration offers some guidelines.
As Botox only lasts for about four months, repeated injections may be needed to maintain the cosmetic appearance derived from the treatment. As the injections wear off, lines and wrinkles reappear.
According to the FDA, some side effects from Botox injections may include droopiness of the eyelid, flu-like symptoms, nausea and headache. In rare cases, there can be more serious side effects since the treatment is derived from the same bacterium that causes botulism, a deadly illness that makes it hard to breathe or move.
You should never receive Botox if you are or may be pregnant, or are breast-feeding. Tell your doctor if you have problems with nerves or muscles, or are taking an antibiotic.