Botulinum
toxin A (Botox) is used to treat wrinkles, excessive sweating and headaches. A
new study from Canada shows that it might be useful to male-pattern baldness. The
pharmaceutical company that manufactures the product paid for the study and the
exact methods have not been revealed, citing intellectual property rights.
Fifty
men had botulinum toxin A injections to their scalp muscles, followed by a
second session twenty-four weeks later.
Assessment included change in hair counts in a 2-cm scalp area, changes in hair
loss counts collected by lint roller from the subject's pillow, and patient
responses to a questionnaire.
In the 40 patients who
completed the study, after 48 weeks mean hair counts increased 18% from
baseline, a statistically significant change. Hair loss was also significantly
reduced, by a mean of 39%. The reduction in hair loss and increase in hair
counts were not correlated. The treatment response rate was 75%. The subjects
noted statistically significant increased hair growth. No adverse events were
noted.
In this study, each
patient received 150 units of botulinum toxin A. When bought in large
quantities, a very good wholesale price is $365/100 units. Most medical
practices double or triple the wholesale cost, not unlike a retail store
mark-up. There is no indication as to how long the beneficial effects lasted.
When used for wrinkle reduction, the effect of botulinum toxin A lasts four to six months.