Tadalafil is used for improving exercise ability in patients with Pulmonary Arterial Hypertension (PAH). It was first introduced by Eli Lilly And Co in its drug Cialis on Nov 21, 2003. Other drugs containing Tadalafil are Adcirca, Tadliq, Chewtadzy. 32 different companies have introduced drugs containing Tadalafil.

Tadalafil Patents

Given below is the list of patents protecting Tadalafil, along with the drug name that holds that patent and the company name owning that drug.

Drug Used in	Drug Patent Number	Drug Patent Title	Drug Patent Expiry	Drug Owner
Adcirca	US5859006	Tetracyclic derivatives; process of preparation and use	Nov 21, 2017 (Expired)	Eli Lilly Co
Adcirca	US5859006 (Pediatric)	Tetracyclic derivatives; process of preparation and use	May 21, 2018 (Expired)	Eli Lilly Co
Adcirca	US6821975	Beta-carboline drug products	Nov 19, 2020 (Expired)	Eli Lilly Co
Adcirca	US6821975 (Pediatric)	Beta-carboline drug products	May 19, 2021 (Expired)	Eli Lilly Co
Adcirca	US7182958	β-carboline pharmaceutical compositions	Apr 26, 2020 (Expired)	Eli Lilly Co
Adcirca	US7182958 (Pediatric)	β-carboline pharmaceutical compositions	Oct 26, 2020 (Expired)	Eli Lilly Co
Cialis	US5859006	Tetracyclic derivatives; process of preparation and use	Nov 21, 2017 (Expired)	Lilly
Cialis	US5859006 (Pediatric)	Tetracyclic derivatives; process of preparation and use	May 21, 2018 (Expired)	Lilly
Cialis	US6140329	Use of cGMP-phosphodiesterase inhibitors in methods and compositions to treat impotence	Jul 11, 2016 (Expired)	Lilly
Cialis	US6821975	Beta-carboline drug products	Nov 19, 2020 (Expired)	Lilly
Cialis	US6821975 (Pediatric)	Beta-carboline drug products	May 19, 2021 (Expired)	Lilly
Cialis	US6943166	Compositions comprising phosphodiesterase inhabitors for the treatment of sexual disfunction	Apr 26, 2020 (Expired)	Lilly
Cialis	US6943166 (Pediatric)	Compositions comprising phosphodiesterase inhabitors for the treatment of sexual disfunction	Oct 26, 2020 (Expired)	Lilly
Cialis	US7182958	β-carboline pharmaceutical compositions	Apr 26, 2020 (Expired)	Lilly
Cialis	US7182958 (Pediatric)	β-carboline pharmaceutical compositions	Oct 26, 2020 (Expired)	Lilly
Tadliq	US11382917	Liquid oral formulations for tadalafil	Dec 24, 2038	Cmp Dev Llc
Tadliq	US11666576	Liquid oral formulations for tadalafil	Dec 24, 2038	Cmp Dev Llc
Tadliq	US11975006	Liquid oral formulations for tadalafil	Dec 24, 2038	Cmp Dev Llc

Add above patents to watchlist

A patent's expiry date may change depending upon legal activities going on that patent. Critical activities like abandoning of a patent, term extension of a patent or amendment of its claims can increase or decrease the life of a patent hence affecting its expiry date and in turn affecting the generic launch date of that drug. Tracking these ongoing activities on a patent application helps to keep an eye on the latest developments in the patent process of the drug which can give an idea of how early a drug's generic could be available. The next section provides a list of recent legal activities on Tadalafil's patents.

Latest Legal Activities on Tadalafil's Patents

Given below is the list recent legal activities going on the following patents of Tadalafil.

Event	Date	Patent/Publication
Legal Activities This Week
Email Notification	06 Jun, 2023	US11666576
Mail Patent eGrant Notification	06 Jun, 2023	US11666576
Patent Issue Date Used in PTA Calculation	06 Jun, 2023	US11666576
Recordation of Patent Grant Mailed	06 Jun, 2023	US11666576
Electronic Review	06 Jun, 2023	US11666576
Recordation of Patent eGrant	06 Jun, 2023	US11666576
Patent eGrant Notification	06 Jun, 2023	US11666576
Email Notification	18 May, 2023	US11666576
Electronic Review	18 May, 2023	US11666576
Issue Notification Mailed	17 May, 2023	US11666576

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