British North America Act. British North America Act, law passed by the British Parliament in 1867 that provided for the unification of the Canadian provinces into the dominion of Canada.Until 1982 the act also functioned as the constitution of Canada.ritish North America Act. British North America Act, law passed by the British Parliament in 1867 that provided for the unification of the Canadian provinces into the dominion of Canada.
Lipitor's generic name is atorvastatin. Two generic drugmakers, Ranbaxy and Watson, can start selling generic atorvastatin in the U.S. right away. Due to complex generic drug laws, other generic drugmakers will have to wait 180 days, until May 2012, to offer their own generic versions of Lipitor.
Crestor needs to remain the engine for AstraZeneca for a few years yet, but has already started to be affected by generic competition to other big-selling cholesterol drugs, notably Pfizer's Lipitor (atorvastatin), which lost US patent protection in 2011.ctavis (formerly Watson Pharma) filed for approval of generic versions of AstraZeneca's product based on rosuvastatin calcium and rosuvastatin zinc and as a result of the settlement will now be able to sell its products on an exclusive basis in the US between May 2 and July 8, 2016.