Phase 4
A study of a treatment that is already approved and in use.
What it means
Phase 4 studies happen after a treatment has been approved. They follow how it performs in everyday practice and watch for effects that only appear in larger numbers or over longer periods.
Why it matters if you take part
The treatment being studied is already available, so the question is usually about long-term use, rarer effects, or how it compares in real-world conditions.
Related terms
Trials recruiting now that are Phase 4
139 recruiting trials in our Canadian corpus are Phase 4.
Sotatercept in Pulmonary Arterial Hypertension
Pulmonary Artery Hypertension · PHASE4
A Study to Measure Mirikizumab Levels in Breast Milk of Lactating Participants Receiving Mirikizumab Therapeutically for an Approved Indication
Lactation · PHASE4
Dabrafenib and/or Trametinib Rollover Study
Melanoma · PHASE4
Perioperative Rectal Methadone in Spine Surgery
Spinal Surgery · PHASE4
Mechanisms of Weight Loss: Tirzepatide vs Semaglutide
Obesity (Disorder) · PHASE4
PATHFINDER: Evaluating the Optimal First-Line Treatment Strategy for Moderate-to-Severely Active Ileal-dominant Crohn's Disease
Crohn Disease · PHASE4
This explains how clinical research works. It is not medical advice and does not describe any specific condition or treatment. Only a trial site can determine whether someone can take part in a study.