In an attack on the regulation of drug marketing, the makers of the antiwrinkle shot Botox have filed a free-speech lawsuit against the federal government.

In the complaint, filed Thursday in federal court in Washington, the specialty pharmaceutical company Allergan charged that restrictions on promoting unapproved uses of Botox for medical conditions like spasticity violate the company’s First Amendment rights to speak freely and truthfully with doctors about its drug products.

Read full story via NYTimes.com.