Last Updated: August 25, 2026

FLOLAN Drug Patent Profile


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When do Flolan patents expire, and when can generic versions of Flolan launch?

Flolan is a drug marketed by Glaxosmithkline Llc and is included in one NDA.

The generic ingredient in FLOLAN is epoprostenol sodium. There are seven drug master file entries for this compound. Four suppliers are listed for this compound. Additional details are available on the epoprostenol sodium profile page.

DrugPatentWatch® Litigation and Generic Entry Outlook for Flolan

A generic version of FLOLAN was approved as epoprostenol sodium by SUN PHARM on January 15th, 2021.

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Summary for FLOLAN
US Patents:0
Applicants:1
NDAs:1
Raw Ingredient (Bulk) Api Vendors: 33
Clinical Trials: 16
Patent Applications: 1,769
Drug Prices: Drug price information for FLOLAN
What excipients (inactive ingredients) are in FLOLAN?FLOLAN excipients list
DailyMed Link:FLOLAN at DailyMed
Recent Clinical Trials for FLOLAN

Identify potential brand extensions & 505(b)(2) entrants

SponsorPhase
University Health Network, TorontoPhase 4
GlaxoSmithKlinePhase 4
Rune RasmussenPhase 2

See all FLOLAN clinical trials

US Patents and Regulatory Information for FLOLAN

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Glaxosmithkline Llc FLOLAN epoprostenol sodium INJECTABLE;INJECTION 020444-001 Sep 20, 1995 DISCN Yes No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Glaxosmithkline Llc FLOLAN epoprostenol sodium INJECTABLE;INJECTION 020444-002 Sep 20, 1995 DISCN Yes No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >TE >Type >RLD >RS >Patent No. >Patent Expiration >Product >Substance >Delist Req. >Exclusivity Expiration

Expired US Patents for FLOLAN

Applicant Tradename Generic Name Dosage NDA Approval Date Patent No. Patent Expiration
Glaxosmithkline Llc FLOLAN epoprostenol sodium INJECTABLE;INJECTION 020444-001 Sep 20, 1995 4,883,812 ⤷  Start Trial
Glaxosmithkline Llc FLOLAN epoprostenol sodium INJECTABLE;INJECTION 020444-001 Sep 20, 1995 4,335,139 ⤷  Start Trial
Glaxosmithkline Llc FLOLAN epoprostenol sodium INJECTABLE;INJECTION 020444-002 Sep 20, 1995 4,539,333 ⤷  Start Trial
Glaxosmithkline Llc FLOLAN epoprostenol sodium INJECTABLE;INJECTION 020444-001 Sep 20, 1995 4,539,333 ⤷  Start Trial
Glaxosmithkline Llc FLOLAN epoprostenol sodium INJECTABLE;INJECTION 020444-002 Sep 20, 1995 4,883,812 ⤷  Start Trial
Glaxosmithkline Llc FLOLAN epoprostenol sodium INJECTABLE;INJECTION 020444-001 Sep 20, 1995 4,338,325 ⤷  Start Trial
Glaxosmithkline Llc FLOLAN epoprostenol sodium INJECTABLE;INJECTION 020444-002 Sep 20, 1995 4,335,139 ⤷  Start Trial
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >Patent No. >Patent Expiration

International Patents for FLOLAN

See the table below for patents covering FLOLAN around the world.

Country Patent Number Title Estimated Expiration
Austria 365926 ⤷  Start Trial
Austria 4411 ⤷  Start Trial
Austria A363479 ⤷  Start Trial
Australia 4704279 ⤷  Start Trial
Australia 525695 ⤷  Start Trial
Belgium 876296 ⤷  Start Trial
Canada 1141661 PREPARATIONS PHARMACEUTIQUES CONTENANT DES PROSTAGLANDINES (PHARMACEUTICAL FORMULATIONS CONTAINING PROSTAGLANDIN COMPOUNDS) ⤷  Start Trial
>Country >Patent Number >Title >Estimated Expiration

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