Engaging Introduction
Let me tell you about the conversation that made thousands of people check their medicine cabinets.
It started with a routine safety update from the FDA. Buried in the language of regulatory agencies—”post-marketing surveillance,” “adverse event reporting,” “risk-benefit analysis”—was a warning that affected millions of Americans. Certain widely used medications, it turned out, carried a higher risk of blood clots, heart attack, and stroke than previously understood.
For people taking birth control pills, hormone replacement therapy, certain anti-inflammatory drugs, or the new class of weight loss medications, the news was alarming. Should they stop taking their medication? Were they at risk? What should they do?
In today’s fast-paced world, many people rely on medications for everyday health issues—from birth control and inflammation relief to weight loss support. But recent safety alerts from major health authorities are raising important conversations about certain medications that may increase the risk of serious cardiovascular events.
Health agencies including the U.S. Food and Drug Administration (FDA), the European Medicines Agency (EMA) , and the World Health Organization (WHO) continuously monitor medication safety. When signals emerge about potential risks, they review evidence, update guidance, and communicate findings to protect public health.
Let me walk you through what these agencies actually do, which medications are under scrutiny, and—most importantly—what you should do if you’re taking them.
How Do Health Authorities Monitor Medication Safety?
The FDA doesn’t just approve drugs and walk away. Its work continues for years, sometimes decades, after a medication reaches the market .
Before approval: Drugs go through three phases of clinical trials involving hundreds or thousands of people. The FDA reviews this data to determine if a drug is safe, effective, and high-quality .
After approval: The FDA continuously monitors real-time data from patients, drug manufacturers, and healthcare professionals, including reports of adverse reactions to prescriptions. Based on this information, the FDA may recommend that drug makers update labeling by adding warnings or revised dosage information .
Why this matters: Clinical trials, while rigorous, may not detect rare side effects that occur in 1 in 10,000 or 1 in 100,000 patients. Once a drug is used by millions of people, new safety information can emerge. That’s why post-marketing surveillance is so critical .
The European Medicines Agency (EMA) works similarly, coordinating with national medicines agencies across Europe to evaluate, supervise, and monitor the safety of medicinal products .
The EMA’s Pharmacovigilance Risk Assessment Committee (PRAC) specifically monitors adverse reaction reports and makes recommendations if a medication’s risks outweigh its benefits .
The World Health Organization (WHO), as the United Nations’ specialized health agency, works with 194 member states to track health data, including medication safety, and to coordinate responses to public health threats .
Which Medications Have Been Linked to Blood Clots, Heart Attack, and Stroke?
Let me be clear: This is not a reason to panic. But it is a reason to be informed.
1. Combined Hormonal Contraceptives (Birth Control Pills)
This is the most well-established link. Estrogen-containing birth control pills increase the risk of blood clots (venous thromboembolism or VTE).
The risk: Women taking combined oral contraceptives have a 2- to 6-fold increased risk of blood clots compared to non-users. However, the absolute risk remains low—about 5-10 cases per 10,000 women per year.
What you should know: For most women, the benefits of preventing pregnancy, reducing ovarian cancer risk, and managing menstrual symptoms outweigh the small clot risk. However, women with additional risk factors (smoking over age 35, obesity, history of clots, certain genetic conditions) should discuss alternatives with their doctor.
2. Hormone Replacement Therapy (HRT)
For decades, HRT was prescribed to manage menopausal symptoms. Then came the Women’s Health Initiative study.
The risk: Combined estrogen-progestin therapy is associated with increased risks of blood clots, stroke, and heart attack. The risk is highest in the first year of use and declines after stopping.
Current guidance: HRT is still appropriate for managing moderate-to-severe menopausal symptoms, but at the lowest effective dose for the shortest duration. Women at high risk for cardiovascular events should consider non-hormonal options.
3. Non-Steroidal Anti-Inflammatory Drugs (NSAIDs)
Common medications like ibuprofen (Advil, Motrin), naproxen (Aleve), and prescription-strength NSAIDs carry cardiovascular risks.
The risk: Long-term, high-dose NSAID use is associated with increased risk of heart attack and stroke. The risk varies by specific medication and duration of use.
What you should know: Occasional use for headaches, muscle pain, or fevers is generally safe. Daily use for chronic pain (arthritis, back pain) requires a conversation with your doctor about minimizing cardiovascular risk.
4. Certain Weight Loss Medications
This is an emerging area of concern. Some newer weight loss medications, particularly those affecting appetite, have been associated with cardiovascular side effects in some patients.
The risk: Variable by medication. Some weight loss drugs have been withdrawn from the market due to heart valve damage or pulmonary hypertension.
What you should know: Always discuss cardiovascular risk with your doctor before starting any weight loss medication. Do not purchase these medications online from unregulated sources.
5. Certain Diabetes Medications
Some medications for type 2 diabetes have been associated with cardiovascular effects—both positive and negative.
The risk: Some older medications carried increased heart failure risk. Newer classes (SGLT2 inhibitors, GLP-1 agonists) have shown cardiovascular benefits.
What you should know: Don’t stop your diabetes medication. The benefits of blood sugar control far outweigh risks for most patients.
What Should You Do If You’re Taking These Medications?
Let me give you clear, actionable guidance.
Do NOT Stop Taking Your Medication Abruptly
This is the most important point. Suddenly stopping blood pressure medication, diabetes medication, or hormone therapy can have serious health consequences. Always talk to your doctor before making changes.
Have an Informed Conversation With Your Doctor
Ask these questions:
“Based on my personal risk factors (age, smoking, weight, family history), what is my actual risk of a cardiovascular event on this medication?”
“Are there lower-risk alternatives I could consider?”
“What symptoms should I watch for that might indicate a problem?”
Know the Warning Signs
If you’re taking any medication associated with cardiovascular risk, familiarize yourself with these symptoms:
Blood clot (deep vein thrombosis or pulmonary embolism):
Swelling, pain, warmth, or redness in one leg (usually the calf)
Sudden shortness of breath
Chest pain that worsens with deep breathing
Coughing up blood
Heart attack:
Chest discomfort (pressure, squeezing, fullness)
Pain radiating to the arm, jaw, back, or stomach
Shortness of breath
Nausea, lightheadedness, breaking out in a cold sweat
Stroke:
Sudden numbness or weakness on one side of the face or body
Confusion, trouble speaking or understanding
Sudden vision changes in one or both eyes
Sudden severe headache with no known cause
Difficulty walking, dizziness, loss of balance
If you experience any of these symptoms, seek emergency medical attention immediately. Do not wait.
Reduce Your Other Cardiovascular Risk Factors
The same lifestyle measures that protect your heart also reduce medication-related risks:
Don’t smoke
Maintain a healthy weight
Exercise regularly
Control blood pressure and cholesterol
Eat a balanced diet
Limit alcohol
Why Do These Warnings Take Years to Emerge?
Here’s something most people don’t understand.
Clinical trials aren’t large enough to detect rare side effects. The FDA requires clinical trials that may involve 1,000 to 3,000 participants . A side effect that occurs in 1 in 10,000 people might not appear in those trials .
Some risks take time to develop. Cardiovascular events like heart attack and stroke may not emerge until someone has been taking a medication for years. The Framingham Heart Study took decades to establish the link between cholesterol and heart disease.
