MedlinePlus: Bosentan
- Provides information on usage, precautions, side effects and brand names when available. Data provided by government agencies and health-related organizations
- http://www.nlm.nih.gov/medlineplus/druginfo/medmaster/a605001.html

Bosentan Therapy for Pulmonary Arterial Hypertension
- Actelion's slide show presentation to the FDA.
- http://www.fda.gov/ohrms/dockets/ac/01/slides/3775S2_01_ACTELION/Index.htm

FDA Approves First Oral Medication for Pulmonary Arterial Hypertension
- Describes the trial results and subsequent approval of Tracleer.
- http://www.fda.gov/bbs/topics/ANSWERS/2001/ANS01121.html

Tracleer
- Features an overview of pulmonary hypertension, prescribing information for US residents, and press releases.
- http://www.tracleer.com/