Assess Efficacy of of Oral Treprostinil in Patients With Symptomatic Primary or Secondary Raynaud's Phenomenon

Study Purpose

This study represents the first trial to assess the efficacy of oral treprostinil therapy in patients with symptomatic primary or secondary Raynaud's Phenomenon (RP) resistant to vasodilatory therapy. The study will be randomized 1:1 UT-15C to placebo. The design is a crossover study and all subjects will be randomized to receive oral treprostinil sustained release tablets or matching placebo for 12 weeks and then crossover for 12 weeks. All subjects will be exposed for 12 weeks of treatment with oral UT-15C during the study.

Recruitment Criteria

Accepts Healthy Volunteers

Healthy volunteers are participants who do not have a disease or condition, or related conditions or symptoms

Study Type

An interventional clinical study is where participants are assigned to receive one or more interventions (or no intervention) so that researchers can evaluate the effects of the interventions on biomedical or health-related outcomes.

An observational clinical study is where participants identified as belonging to study groups are assessed for biomedical or health outcomes.

Searching Both is inclusive of interventional and observational studies.

Eligible Ages 18 Years - 65 Years
Gender All
More Inclusion & Exclusion Criteria

Inclusion Criteria:

  • - Patients aged ≥18-65 years.
  • - Active Raynaud's Phenomenon defined as patients with refractory RP having four or more RP attacks per week in the 2 weeks before inclusion in the study despite treatment with vasodilators for at least 3 months.
  • - Patients with primary Raynaud's Phenomenon.
  • - Patients with Raynaud's secondary to connective tissue diseases (including scleroderma (SSc), limited scleroderma (CREST), mixed connective tissue disease (MCTD), primary Sjogren's syndrome (SS), systemic lupus erythematosus (SLE), with diagnosis of the underlying rheumatic disease based on standard criteria.
  • - Patients on stable dose phosphodiesterase inhibitors (sildenafil, tadalafil or vardenafil), endothelin antagonists, alpha adrenergic antagonists, or calcium channel blockers defined as 3-months with no change in dose will be allowed to participate.

Exclusion Criteria:

  • - Uncontrolled hypertension, diabetes mellitus, history of orthostatic hypotension, acute coronary or cerebrovascular event within 3 months, evidence of malignancy, history of sympathectomy.
  • - Smoking within 3 months or smoking cessation using nicotine products.
  • - Subjects currently taking or other prostacyclins.
  • - Pregnant or breast feeding or considering pregnancy in next 4 months.
- Participation in trial with an investigational drug within 30 days

Trial Details

Trial ID:

This trial id was obtained from, a service of the U.S. National Institutes of Health, providing information on publicly and privately supported clinical studies of human participants with locations in all 50 States and in 196 countries.


Phase 1: Studies that emphasize safety and how the drug is metabolized and excreted in humans.

Phase 2: Studies that gather preliminary data on effectiveness (whether the drug works in people who have a certain disease or condition) and additional safety data.

Phase 3: Studies that gather more information about safety and effectiveness by studying different populations and different dosages and by using the drug in combination with other drugs.

Phase 4: Studies occurring after FDA has approved a drug for marketing, efficacy, or optimal use.

Early Phase 1
Lead Sponsor

The sponsor is the organization or person who oversees the clinical study and is responsible for analyzing the study data.

Brigham and Women's Hospital
Principal Investigator

The person who is responsible for the scientific and technical direction of the entire clinical study.

Aaron Waxman, MD/PhDPaul Dellaripa, MD
Principal Investigator Affiliation Brigham and Womens HospitalBrigham and Womens Hospital
Agency Class

Category of organization(s) involved as sponsor (and collaborator) supporting the trial.

Overall Status Recruiting
Countries United States

The disease, disorder, syndrome, illness, or injury that is being studied.

Raynaud's Phenomenon
Additional Details

A single center double-blinded, placebo-controlled, crossover study to assess efficacy of oral treprostinil titrated to a tolerable goal dose of 2.0 mg three times per day (TID) in 20 patients with symptomatic primary or secondary Raynaud's Phenomenon resistant to vasodilatory therapy. Based on a pre-screening survey of the clinic population we anticipate at least 30 patients per year will be eligible for enrollment. At the clinicians discretion the dose can be increased as tolerated. Eligible subjects at the time of signing an informed consent will have a diagnosis of primary or secondary Raynaud's Phenomenon. Subjects will be recruited from the Raynaud's Clinic, which is a multidisciplinary clinic held at the Watkins Clinic at the Shapiro Cardiovascular Center. Subjects will be assessed during a Screening and treatment initiation visit to determine eligibility for the study. This study represents the first trial to assess the efficacy of oral treprostinil therapy in patients with symptomatic primary or secondary Raynaud's phenomenon resistant to vasodilatory therapy. Oral treprostinil (UT-15C), a synthetic prostacyclin analog that inhibits platelet aggregation, induces vasodilation, and suppresses smooth muscle proliferation. In a recent open label study of escalating doses of oral treprostinil in patients with systemic sclerosis and digital ischemia, oral treprostinil was effectively absorbed in patients with scleroderma and was temporally associated with improved cutaneous perfusion and temperature. Thus, oral treprostinil may provide a new therapeutic option for patients with refractory secondary Raynaud's Phenomenon. A recent systematic review demonstrated that oral calcium channel blockers, the most commonly prescribed drugs for primary RP, are only minimally effective in reducing the frequency of attacks and severity. Although Sildenafil has been shown to increase digital skin blood flow during all phases of local cooling in primary RP, its role in primary RP is not yet confirmed in randomized, controlled trials. To our knowledge, very few studies have assessed the use of oral prostacyclin therapy for disabling primary RP, although one multicenter, double-blind, randomized trial of an oral analog of prostacyclin, known as beraprost, reduced the number of RP attacks but proved no more beneficial than placebo.

Arms & Interventions


Active Comparator: oral treprostinil

Dosing of oral treprostinil will be initiated at 0.125 mg three times daily. Dose escalations of oral treprostinil can occur every 72 hours (three consecutive doses) in 0.125 mg increments. Subjects will be titrated as tolerated to a goal dose of 2mg TID over a 6-week period.

Placebo Comparator: Placebo

Placebo mimics oral treprostinil and will be taken three times a day


Drug: - oral treprostinil

Change in the Raynaud's Condition Score from baseline (2-week run in), comparing treprostinil treatment phase vs. placebo phase

Drug: - Placebo

Placebo is a sugar pill manufactured to resemble UT-15C. Change in the Raynaud's Condition Score from baseline (2-week run in), comparing treprostinil treatment phase vs. placebo phase

Contact a Trial Team

If you are interested in learning more about this trial, find the trial site nearest to your location and contact the site coordinator via email or phone. We also strongly recommend that you consult with your healthcare provider about the trials that may interest you and refer to our terms of service below.

Brigham and Women's Hospital, Boston, Massachusetts




Brigham and Women's Hospital

Boston, Massachusetts, 02115

Site Contact

Laurie Lawler, RN

[email protected]