What is Comp03 used for?

Comp03 is indicated for Relapsing forms of multiple sclerosis.

Comp03 is developed by Promius Pharma, LLC.

What are the side effects of Comp03?

Common side effects include Headache, Nausea, Diarrhea, Fatigue.

Last reviewed 2026-04-23 · How we verify

Comp03

Promius Pharma, LLC · Phase 2 active Small molecule

Comp03 is a small molecule that targets the S1P receptor.

Comp03 is a small molecule that targets the S1P receptor. Used for Relapsing forms of multiple sclerosis.

At a glance

Generic name	Comp03
Sponsor	Promius Pharma, LLC
Drug class	S1P receptor modulator
Target	S1P receptor
Modality	Small molecule
Therapeutic area	Multiple sclerosis
Phase	Phase 2

Mechanism of action

It works by binding to the sphingosine-1-phosphate (S1P) receptor, which is involved in the regulation of lymphocyte trafficking and immune response.

Approved indications

Relapsing forms of multiple sclerosis

Common side effects

Headache
Nausea
Diarrhea
Fatigue

Key clinical trials

ACT01 in Combination With Comp01-04 in Patients With Actinic Keratosis (PHASE2)

Primary sources

Every claim on this page is sourced from regulatory or scientific primary sources. See our editorial policy for full methodology.

Source	Used for
ClinicalTrials.gov	Trial enrolment, design, endpoints, results

Competitive intelligence

For the full competitive landscape — auto-detected comparators, recent regulatory actions across the set, upcoming PDUFA, patent timeline, sponsor landscape:

Comp03 CI brief — competitive landscape report
Comp03 updates RSS · CI watch RSS
Promius Pharma, LLC portfolio CI