Nextstellis 28 Day Side Effects: What to Expect and When to Call Your Doctor

Like all combination oral contraceptives, Nextstellis 28 Day can cause side effects. Some are mild and temporary, especially during the first few months. Others are serious and require immediate medical attention. Understanding the difference can help you make informed decisions about your health.

This guide covers what the clinical data and the FDA-approved label say about Nextstellis side effects — and practical guidance on what to do.

Boxed Warning: Smoking and Cardiovascular Risk

Before we cover common side effects, it's important to note the most serious warning on Nextstellis: Females over 35 years old who smoke should not use Nextstellis. Cigarette smoking increases the risk of serious cardiovascular events — including blood clots, heart attack, and stroke — when taking combination hormonal contraceptives. This risk increases with age and the number of cigarettes smoked.

Common Side Effects of Nextstellis (Reported in ≥2% of Users)

The following side effects were reported in at least 2% of women in Phase 3 clinical trials:

• Bleeding irregularities: Unscheduled (breakthrough) bleeding or spotting, especially in the first 3–4 months. About 30% of women experience it in Cycle 1, decreasing to about 17% by Cycle 12.
• Mood disturbance / depression: Reported in about 10.9% of users in Phase 3 studies. This is an important side effect to discuss with your provider if you have a history of depression.
• Headache: Reported in approximately 4.8% of users. New or severe migraine headaches, particularly with aura, require immediate medical evaluation.
• Breast symptoms: Breast tenderness or discomfort, reported in about 5.3% of users. Usually mild and improves over time.
• Dysmenorrhea: Painful periods. Some users report this improving over time; for others it may persist.
• Acne: Drospirenone has anti-androgenic properties, which can actually improve acne for some users; others may experience breakouts during the adjustment period.
• Weight change: Weight changes were reported in clinical trials. Due to drospirenone's anti-mineralocorticoid properties, Nextstellis may cause less water retention than EE-based pills — some patients may experience less bloating compared to other birth control pills.
• Decreased libido: Reported in some users. Estetrol's lower impact on SHBG compared to EE may reduce this side effect compared to other oral contraceptives.

Serious Side Effects: Stop Nextstellis and Get Help If You Experience These

Seek immediate medical care for any of the following:

• Blood clots (VTE): Leg pain or swelling, chest pain, difficulty breathing, sudden vision changes, or severe headache may be signs of a blood clot (deep vein thrombosis, pulmonary embolism, or stroke). Call 911 immediately.
• High blood pressure: If your blood pressure reaches 180/120 mmHg or higher, stop Nextstellis and seek emergency care.
• Hyperkalemia (high potassium): Symptoms include muscle weakness, irregular heartbeat, tingling, and numbness. Risk is elevated in patients taking ACE inhibitors, ARBs, potassium-sparing diuretics, or NSAIDs.
• Gallbladder disease / cholestasis: Severe abdominal pain, nausea, fever, or jaundice may indicate gallbladder problems. Contact your provider.
• Liver problems: Yellowing of skin or eyes (jaundice), abdominal pain, dark urine. Liver tumors, while rare, are a known risk with long-term hormonal contraceptive use.
• Migraine with aura: New onset or worsening migraines, especially those associated with visual changes, should prompt discontinuation and immediate medical evaluation due to elevated stroke risk.

How Nextstellis Compares to Other Oral Contraceptives for Side Effects

Nextstellis's key side-effect differentiators stem from its unique estrogen (estetrol):

• Lower SHBG increase: Estetrol caused significantly lower increases in sex hormone-binding globulin (SHBG) compared to EE-based pills, which may reduce the libido decrease that some women experience on other birth control pills.
• More neutral lipid profile: Phase 3 data showed minimal impact on triglycerides, cholesterol, and glucose — potentially better than EE-based comparators.
• Less water retention: Drospirenone's anti-mineralocorticoid effect reduces fluid retention, which may decrease bloating.

When to Call Your Doctor About a Side Effect

Call your doctor (not 911) for:

• Breakthrough bleeding that persists beyond 3–4 months or is heavy
• New or worsening depression, mood changes, or emotional disturbances
• Persistent severe headaches not associated with aura
• No period during the white inactive pill days (possible sign of pregnancy)
• Breast tenderness that does not resolve after the first few months

The Bottom Line

Most Nextstellis side effects are mild and improve after the first few months of use. Bleeding irregularities and mood changes are the most commonly reported. Serious side effects — blood clots, severe hypertension, migraine with aura — require immediate attention. Always discuss your complete medical history with your provider before starting Nextstellis. To learn more about what Nextstellis is and how it works, read our guide What Is Nextstellis? And if availability is your challenge, medfinder can help you find Nextstellis in stock near you.