Generic Letairis Availability

Letairis is a brand name of ambrisentan, approved by the FDA in the following formulation(s):

LETAIRIS (ambrisentan - tablet;oral)

  • Manufacturer: GILEAD
    Approval date: June 15, 2007
    Strength(s): 5MG, 10MG [RLD]

Has a generic version of Letairis been approved?

No. There is currently no therapeutically equivalent version of Letairis available in the United States.

Note: Fraudulent online pharmacies may attempt to sell an illegal generic version of Letairis. These medications may be counterfeit and potentially unsafe. If you purchase medications online, be sure you are buying from a reputable and valid online pharmacy. Ask your health care provider for advice if you are unsure about the online purchase of any medication.

See also: About generic drugs.

Related Patents

Patents are granted by the U.S. Patent and Trademark Office at any time during a drug's development and may include a wide range of claims.

  • 3-(Het) arylcarboxylic acid derivatives, their preparation and intermediates for their preparation
    Patent 5,703,017
    Issued: December 30, 1997
    Inventor(s): Baumann; Ernst & Rheinheimer; Joachim & Vogelbacher; Uwe Josef & Bratz; Matthias & Theobald; Hans & Gerber; Matthias & Westphalen; Karl-Otto & Walter; Helmut & Rademacher; Wilhelm
    Assignee(s): BASF Aktiengesellschaft
    3-(Het)arylcarboxylic acid derivatives of the formula I ##STR1## where R is formyl, CO.sub.2 H or a radical hydrolyzable to COOH and the other substituents have the following meanings: R.sup.2 and R.sup.3 are each halogen, alkyl, haloalkyl, alkoxy, haloalkoxy or alkylthio; X is nitrogen or CR.sup.14, where R.sup.14 is hydrogen or, together with R.sup.3, forms an alkylene or alkenylene chain, in each of which a methylene group is replaced by oxygen; R.sup.4 is phenyl or naphthyl, each of which is unsubstituted or substituted or an unsubstituted or substituted five-membered or six-membered heteroaromatic structure containing one to three nitrogen atoms or one sulfur or oxygen atom; R.sup.5 is hydrogen, alkyl, alkenyl, alkynyl, cycloalkyl, haloalkyl, alkoxyalkyl, alkylthioalkyl or phenyl; R.sup.6 is C.sub.1 -C.sub.8 -alkyl, C.sub.3 -C.sub.6 -alkenyl, C.sub.3 -C.sub.6 -alkynyl or C.sub.3 -C.sub.4 -cyclo-alkyl, each of which may be mono- or polysubstituted; Y is sulfur, oxygen or a single bond; and Z is sulfur or oxygen; with the proviso that R.sup.6 is not unsubstituted C.sub.1 -C.sub.4 -alkyl when R.sup.4 is unsubstituted phenyl, Z is oxygen and simultaneously R.sup.5 is methyl or hydrogen.
    Patent expiration dates:
    • December 30, 2014
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      Drug substance
  • Use of carboxylic acid derivatives as drugs
    Patent 5,840,722
    Issued: November 24, 1998
    Inventor(s): Baumann; Ernst & Vogelbacher; Uwe Josef & Rheinheimer; Joachim & Klinge; Dagmar & Riechers; Hartmut & Kroger; Burkhard & Bialojan; Siegfried & Bollschweiler; Claus & Wernet; Wolfgang & Unger; Liliane & Raschack; Manfred
    Assignee(s): BASF Aktiengesellschaft
    A method of inhibiting endothelin receptors by administering to a patient a compound of the formula I ##STR1##
    Patent expiration dates:
    • November 24, 2015
      ✓ 
      Patent use: TREATMENT OF PULMONARY ARTERIAL HYPERTENSION BY INHIBITING ENDOTHELIN RECEPTORS
    • November 24, 2015
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      Patent use: METHOD OF INHIBITING ENTHOTHELIN RECEPTORS BY ADMINISTERING AMBRISENTAN TO A PATIENT TO TREAT PULMONARY ARTERIAL HYPERTENSION.
  • Carboxylic acid derivatives, their preparation and use
    Patent 7,109,205
    Issued: September 19, 2006
    Inventor(s): Riechers; Hartmut & Klinge; Dagmar & Amberg; Wilhelm & Kling; Andreas & Müller; Stefan & Baumann; Ernst & Rheinheimer; Joachim & Vogelbacher; Uwe Josef & Wernet; Wolfgang & Unger; Liliane & Raschack; Manfred
    Assignee(s): Abbott GmbH & Co. KG
    Carboxylic acid derivatives where R–R6, X, Y and Z have the meanings stated in the description, and the preparation thereof, are described. The novel compounds are suitable for controlling diseases.
    Patent expiration dates:
    • October 7, 2015
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      Drug substance
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      Drug product
  • Carboxylic acid derivatives, their preparation and use
    Patent 7,601,730
    Issued: October 13, 2009
    Inventor(s): Riechers; Hartmut & Klinge; Dagmar & Amberg; Wilhelm & Kling; Andreas & Muller; Stefan & Baumann; Ernst & Rheinheimer; Joachim & Vogelbacher; Uwe Josef & Wernet; Wolfgang & Unger; Liliane & Raschack; Manfred
    Assignee(s): Abbott GmbH & Co. KG
    Carboxylic acid derivatives where R—R6, X, Y and Z have the meanings stated in the description, and the preparation thereof, are described. The novel compounds are suitable for controlling diseases.
    Patent expiration dates:
    • October 7, 2015
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      Patent use: METHOD TO TREAT PULMONARY HYPERTENSION BY ADMINISTERING AMBRISENTAN TO A PATIENT
  • Carboxylic acid derivatives, their preparation and use
    Patent 8,349,843
    Issued: January 8, 2013
    Inventor(s): Riechers; Hartmut & Klinge; Dagmar & Amberg; Wilhelm & Kling; Andreas & Muller; Stefan & Baumann; Ernst & Rheinheimer; Joachim & Vogelbacher; Uwe & Wernet; Wolfgang & Unger; Liliane & Raschack; Manfred
    Assignee(s): Abbott GmbH & Co. KG
    Carboxylic acid derivatives where R—R6, X, Y and Z have the meanings stated in the description, and the preparation thereof, are described. The novel compounds are suitable for controlling diseases.
    Patent expiration dates:
    • October 7, 2015
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      Drug substance
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      Drug product
  • Carboxylic acid derivatives, their preparation and use
    Patent RE42462
    Issued: June 14, 2011
    Inventor(s): Riechers; Hartmut & Klinge; Dagmar & Amberg; Wilhelm & Kling; Andreas & Muller; Stefan & Baumann; Ernst & Rheinheimer; Joachim & Vogelbacher; Uwe Josef & Wernet; Wolfgang & Unger; Liliane & Raschack; Manfred
    Assignee(s): Abbott GmbH & Co. KG
    Carboxylic acid derivatives where R-R6, X, Y and Z have the meanings stated in the description, and the preparation thereof, are described. The novel compounds are suitable for controlling diseases.
    Patent expiration dates:
    • July 29, 2018
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      Drug substance

Related Exclusivities

Exclusivity is exclusive marketing rights granted by the FDA upon approval of a drug and can run concurrently with a patent or not. Exclusivity is a statutory provision and is granted to an NDA applicant if statutory requirements are met.

  • Exclusivity expiration dates:
    • June 15, 2014 -

Glossary

TermDefinition
Drug PatentA drug patent is assigned by the U.S. Patent and Trademark Office and assigns exclusive legal right to the patent holder to protect the proprietary chemical formulation. The patent assigns exclusive legal right to the inventor or patent holder, and may include entities such as the drug brand name, trademark, product dosage form, ingredient formulation, or manufacturing process A patent usually expires 20 years from the date of filing, but can be variable based on many factors, including development of new formulations of the original chemical, and patent infringement litigation.
Drug ExclusivityExclusivity is the sole marketing rights granted by the FDA to a manufacturer upon the approval of a drug and may run simultaneously with a patent. Exclusivity periods can run from 180 days to seven years depending upon the circumstance of the exclusivity grant.
RLDA Reference Listed Drug (RLD) is an approved drug product to which new generic versions are compared to show that they are bioequivalent. A drug company seeking approval to market a generic equivalent must refer to the Reference Listed Drug in its Abbreviated New Drug Application (ANDA). By designating a single reference listed drug as the standard to which all generic versions must be shown to be bioequivalent, FDA hopes to avoid possible significant variations among generic drugs and their brand name counterpart.
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