The more areas that need treatment the higher the cost of treatment. The reason is also simple – the cost of Botox or Dysport that the doctor pays for the drugs is relatively expensive and therefore that cost is obviously passed along to the patient. A second factor that many patients are unaware of is that Botox and Dysport come in a powder form that must be mixed with sterile saline to reconstitute the vial. The amount of water that is mixed with the Botox or Dysport determines the concentration of the medicine. Some doctors and nurses dilute the powder too much so that the concentration of Botox or Dysport is weak. So if you go to a provider who advertises a cheap price for injections you should question whether or not you are receiving a very dilute injection.This dilute mixture typically does not produce the same effect as a more or not concentrated (more expensive) injection and does not last as long.
It's also not approved by the U.S. Food and Drug Administration (FDA) for depression, not that that stops doctors from prescribing it that way. Such off-label use of Botox, like that of any FDA-approved drug, is legal in the U.S. That's because once a drug has been approved by the FDA for a condition, licensed physicians are legally allowed to prescribe it for any medical issue they think it could benefit, regardless of whether it's been proved to work for that condition.
Tell your doctor if you have received any other botulinum toxin product in the last 4 months; have received injections of botulinum toxin such as Myobloc®, Dysport®, or Xeomin® in the past (tell your doctor exactly which product you received); have recently received an antibiotic by injection; take muscle relaxants; take an allergy or cold medicine; take a sleep medicine; take aspirin-like products or blood thinners.