Allergan Inc. won U. S. control to trade Botox as treatment measure for chronic migraine headaches after pleading guilty 10 days ago for its charges against unapproved uses.

The Food and Drug Administration offered a clear statement hinting the fact that Botox is meant for people who suffer from migraines at least 15 days a month.

Botox is essentiality a drug which clears the path which leads to the association with nerves, is a purified form of the poison botulinum.

Botox, also is used to relax facial wrinkles and treat neurological disorders, and at the same time is the Irvine, California-based company’s top product with $1.3 billion in annual sales last year. The migraine hints might add additional revenue of $1 billion in annual revenue, Aaron Gal, a Sanford C. Bernstein & Co. analyst in New York, states.

Russell Katz, director of the FDA’s division of neurology products, through a statement adds, “Chronic migraine is one of the most disabling forms of headache. This condition can greatly affect family, work, and social life, so it is important to have a variety of effective treatment options available.”

The news led Allergan grow from $4.54, or 6.6 percent, to $73.40 at 6:42 p. m. in extended trading on the New York Stock Exchange after closing at $68.86.