What You Need to Know About Twirla Side Effects

Every medication comes with potential side effects, and Twirla — the once-weekly contraceptive patch — is no exception. The good news is that most women tolerate Twirla well, and the most common side effects are mild and temporary. But because Twirla is a combined hormonal contraceptive (CHC) containing Levonorgestrel and Ethinyl Estradiol, there are some serious risks you should know about before starting.

This guide covers the common side effects, the serious ones, who may be at higher risk, and exactly when you should pick up the phone and call your doctor.

What Is Twirla?

Twirla is a prescription contraceptive patch made by Agile Therapeutics. You wear one small, round patch on your skin for 7 days, replace it weekly for 3 weeks, then go patch-free for the fourth week. It delivers 120 mcg of Levonorgestrel and 30 mcg of Ethinyl Estradiol through your skin every day to prevent pregnancy. For a deeper look at how it works, see our guide on Twirla's mechanism of action.

Common Side Effects

The following side effects were reported in clinical trials and are generally mild. Most improve within the first 2–3 months of use as your body adjusts:

• Application site reactions (about 6% of users) — This is the most commonly reported side effect. It can include redness, irritation, itching, rash, or skin color changes where the patch is applied. Rotating the application site each week (buttock, abdomen, or upper torso — never the breast) can help.
• Nausea (about 4%) — Some women feel queasy, especially during the first month. Taking the patch on a full stomach day won't help since it's absorbed through the skin, but nausea typically fades with time.
• Headache (about 4%) — Mild headaches are common when starting any hormonal contraceptive. Over-the-counter pain relievers like Acetaminophen or Ibuprofen usually help.
• Dysmenorrhea / painful periods (about 2%) — Some women experience cramping, though for many women, hormonal contraceptives actually reduce menstrual cramps over time.
• Weight gain (about 2%) — A small percentage of women report modest weight changes.
• Breast tenderness — Hormonal fluctuations can cause breast soreness, especially in the first few cycles.
• Irregular bleeding or spotting — Breakthrough bleeding between periods is normal in the first 1–3 months and usually resolves on its own.
• Mood changes — Some women report mood swings, irritability, or changes in emotional well-being.

Serious Side Effects

While rare, the following side effects are serious and require immediate medical attention. These risks are associated with all combined hormonal contraceptives, not just Twirla:

Blood Clots (Venous Thromboembolism)

The most significant risk with any CHC is blood clots. These can form in the legs (deep vein thrombosis, or DVT) or travel to the lungs (pulmonary embolism, or PE). Symptoms to watch for include:

• Sudden swelling, pain, or warmth in one leg
• Sudden shortness of breath or difficulty breathing
• Sharp chest pain, especially when breathing deeply
• Coughing up blood

Call 911 or go to the ER immediately if you experience any of these symptoms.

Heart Attack and Stroke (Arterial Thromboembolism)

Combined hormonal contraceptives can increase the risk of heart attack and stroke, particularly in women who smoke. Warning signs include:

• Sudden severe headache unlike any you've had before
• Sudden numbness or weakness on one side of the body
• Sudden difficulty speaking or confusion
• Crushing chest pain or pressure radiating to the arm or jaw

Liver Problems

Rarely, CHCs have been associated with liver tumors (hepatic adenomas) and other liver issues. Seek medical attention for:

• Severe abdominal pain (upper right area)
• Yellowing of the skin or eyes (jaundice)
• Dark urine or pale stools

Gallbladder Disease

Estrogen-containing contraceptives may increase the risk of gallbladder disease. Symptoms include sudden pain in the upper right abdomen, especially after eating fatty foods.

High Blood Pressure

Twirla can cause elevated blood pressure in some women. Your doctor should check your blood pressure before prescribing and at follow-up visits.

Depression

While mood changes are a common mild side effect, some women experience clinically significant depression. If you notice persistent sadness, loss of interest in activities, or thoughts of self-harm, contact your provider right away.

Twirla's Boxed Warning

Twirla carries an FDA boxed warning — the most serious type of safety warning — covering two major risks:

1. Cigarette smoking and cardiovascular events: Women over 35 who smoke must not use Twirla. Smoking dramatically increases the risk of blood clots, heart attack, and stroke when combined with hormonal contraceptives.
2. BMI restriction: Twirla is contraindicated in women with a BMI of 30 kg/m² or above. In women with higher BMI, the patch is less effective at preventing pregnancy and carries a higher risk of venous thromboembolism. Women with a BMI between 25 and 30 should know that efficacy may be reduced.

Specific Populations at Higher Risk

Certain groups should use extra caution or avoid Twirla entirely:

• Women with BMI ≥30 — Contraindicated. Reduced efficacy and increased VTE risk.
• Women with BMI 25–30 — Twirla may be less effective. Discuss with your doctor.
• Smokers over 35 — Contraindicated due to serious cardiovascular risk.
• Women with a history of blood clots — Cannot use Twirla.
• Women with migraines with aura — Increased stroke risk with CHCs.
• Women with certain heart conditions — Including valvular disease with complications, coronary artery disease, and cerebrovascular disease.
• Women with liver disease or liver tumors — Cannot use Twirla.
• Women with breast cancer — Current or past estrogen-sensitive cancers are a contraindication.
• Pregnant or breastfeeding women — Twirla should not be used during pregnancy or while nursing.

For a complete list of contraindications, talk to your doctor or read the full prescribing information.

How to Manage Common Side Effects

If you're experiencing mild side effects, here are some practical tips:

• Skin irritation: Rotate your patch site each week between the buttock, abdomen, and upper torso. Clean and dry the skin before applying. Don't apply lotion, oil, or powder to the area first.
• Nausea: This usually improves after the first month. If it persists beyond 2–3 cycles, talk to your doctor.
• Headaches: Stay hydrated and use OTC pain relievers as needed. If headaches become severe or you develop visual disturbances, contact your provider immediately — this could signal a migraine with aura.
• Spotting: Breakthrough bleeding is normal in the first few months. Don't stop using the patch — it should resolve. If heavy bleeding continues past 3 months, consult your doctor.
• Mood changes: Track your mood to identify patterns. If you notice worsening depression or anxiety, talk to your provider about whether Twirla is the right fit.

If side effects are significantly affecting your quality of life, your doctor may recommend switching to a different contraceptive method.

Final Thoughts

Most women who use Twirla experience only mild, temporary side effects — or none at all. The most common issues are skin reactions at the patch site, nausea, and headache, which typically improve within the first few months. However, because Twirla is a combined hormonal contraceptive, it does carry serious risks including blood clots, stroke, and heart attack, especially for smokers over 35 and women with a BMI of 30 or higher.

The key is knowing what to watch for. If you experience sudden leg swelling, chest pain, severe headache, difficulty breathing, or vision changes, seek emergency medical care immediately.

Want to learn more about Twirla? Read our complete guide: What Is Twirla? Uses, Dosage, and What You Need to Know. Ready to fill your prescription? Search Medfinder to find Twirla in stock near you.