Several medications are being withdrawn or restricted after concerns about serious clot-related risks. Some of the affected drugs include hormonal contraceptives, certain diet pills, anti-inflammatory medications, and rare COVID-19 treatments. Health authorities say these actions are precautionary while further safety evaluations continue.

Regulators warn that these medicines may increase the risk of “life-threatening conditions like blood clots, embolisms, strokes, and heart attacks.” Because of these potential dangers, health agencies have started reviewing the safety of the drugs and, in some cases, removing them from circulation.

Blood clots, medically known as thrombi, can block blood flow to critical organs. Although clotting normally protects the body by stopping bleeding, abnormal clots can lead to severe complications. According to health experts, these clots may cause “pulmonary embolism, deep vein thrombosis, strokes, or heart attacks”—conditions that can be fatal if not treated quickly.

Some people face higher risks than others. Individuals with high blood pressure, obesity, diabetes, a history of smoking, or inherited clotting disorders may be more vulnerable to complications. In response, regulators have “restricted or suspended the use of affected drugs” while scientists and medical authorities continue investigating their safety.

Health professionals emphasize that patients should remain cautious but not panic. Anyone experiencing warning signs such as chest pain, swelling in the limbs, severe headaches, or sudden vision changes should seek medical attention immediately. At the same time, experts strongly advise patients: “Do not stop any prescribed medications without first consulting a healthcare provider.” Reporting unusual side effects can also help authorities identify potential risks and protect other patients.