As noted by the United States Food and Drug Administration (FDA):
"The term “authorized
generic” drug is most commonly used to describe an approved, brand name
drug that is marketed as a generic product without the brand name on its
label. Other than the fact that it does not have the brand name on its
label, it is the exact same drug product as the branded product. It may
be marketed by the brand name drug company, or another company with the
brand company’s permission. In some cases, even though it is the same as
the brand name product, the authorized generic may be sold at a lower
cost than the brand name drug."
(source: https://www.fda.gov/drugs/developmentapprovalprocess/howdrugsaredevelopedandapproved/approvalapplications/abbreviatednewdrugapplicationandagenerics/ucm126389.htm )
As an example, in the April 20, 2017 press release, Teva Pharmaceuticals announced: "Teva Launches AirDuo™ RespiClick® and its Authorized Generic, Two Inhalers Containing Fluticasone Propionate and Salmeterol" and noted:
"AirDuo
™ RespiClick
® and its authorized generic are
fixed-dose combination asthma therapies containing an ICS and a LABA,
the same active ingredients as Advair
®. The authorized
generic is known as fluticasone propionate and salmeterol inhalation
powder (multidose dry powder inhaler). Teva is launching both products
at the same time in an effort to address the need for more affordable
asthma treatment options in the U.S. Teva expects that sales of the
authorized generic will represent most of the sales of the two products."
(source: http://www.tevapharm.com/news/teva_launches_airduo_respiclick_and_its
_authorized_generic_two_inhalers_containing_fluticasone_propionate_and_salmeterol_04_17.aspx)