Utovlan Side Effects: Complete Safety Guide
When Do Side Effects Start? How Long Do They Last? Timeline, Contraindications & Food Interactions
Key Takeaways: Utovlan Side Effects at a Glance
- Common side effects: Nausea, headache, breast tenderness, mood changes, irregular bleeding.
- Onset: Can begin within hours or days of starting treatment.
- Duration: Most side effects resolve within a few days of stopping; some may last until the drug is cleared (about 2 days).
- Serious side effects (rare): Blood clots, allergic reaction, jaundice – seek immediate help.
- Contraindications: Pregnancy, blood clot history, liver disease, unexplained bleeding.
- Interactions: Certain epilepsy drugs, antibiotics, St John's wort can reduce effectiveness; avoid with some HIV meds.
Utovlan (norethisterone) is a safe and effective medicine when used correctly, but like all medications, it can cause side effects. This guide explains all possible side effects, when they might start, how long they last, and important safety information to help you use Utovlan with confidence.
When to Seek Emergency Help
Stop Utovlan and contact a doctor immediately if you experience:
- Sudden chest pain, coughing up blood, severe calf pain or swelling (possible blood clot).
- Difficulty breathing, swelling of face/tongue, intense itchy rash (allergic reaction).
- Yellowing of skin or eyes (jaundice).
- Severe headache, vision problems, or weakness on one side of the body.
What Are the Side Effects of Utovlan?
The Patient Information Leaflet (PIL) for Utovlan lists side effects by body system. Not everyone gets them, and they often improve as your body adjusts.
Very common (affecting more than 1 in 10 women)
- Changes in menstrual bleeding (spotting, breakthrough bleeding, absence of periods).
- Breast pain or tenderness.
- Headache.
- Nausea.
- Mood changes, including depression.
Common (affecting 1 in 10 to 1 in 100 women)
- Dizziness.
- Vomiting.
- Acne.
- Weight gain.
- Changes in sex drive.
- Nervousness.
Less common (affecting 1 in 100 to 1 in 1,000 women)
- Rash or hives.
- Hair loss or increased facial/body hair.
- Fluid retention (swollen ankles).
- Changes in liver function tests.
Rare but serious (affecting less than 1 in 1,000 women)
- Blood clots (deep vein thrombosis, pulmonary embolism).
- Severe allergic reaction.
- Jaundice (yellow skin/eyes).
- Benign liver tumours (may cause abdominal pain).
- Stroke or heart attack (very rare).
This is not a full list. Always read the leaflet provided with your medicine.
When Do Utovlan Side Effects Start?
The onset of side effects varies depending on the type:
- Immediate (within hours): Nausea, headache, dizziness – these can start soon after the first dose as the drug enters your bloodstream.
- Early (within days): Breast tenderness, mood changes, spotting – these develop as hormone levels build up.
- Delayed (weeks to months): Weight gain, acne, hair changes – these may take longer to appear with continuous use.
- After stopping: Withdrawal bleed typically occurs 2–4 days after the last tablet; this is expected, not a side effect.
Most common side effects appear within the first few days and often settle as your body gets used to the medicine.
How Long Do Utovlan Side Effects Last?
The duration of side effects depends on the type and how long you take Utovlan.
- While taking Utovlan: Some side effects (like nausea or headache) may improve after a few days as your body adjusts. Others (like breakthrough bleeding) can persist throughout treatment but often settle with continued use.
- After stopping Utovlan: Most side effects resolve once the drug is cleared from your body. Since the half-life is 8–10 hours, it takes about 2 days for complete elimination. Side effects like menstrual irregularities usually resolve within one cycle; mood changes typically improve within days.
- Serious side effects: If you develop a blood clot or liver problem, these require medical treatment and may have longer-term implications.
If side effects bother you or don't go away, talk to your doctor.
Utovlan Side Effects Timeline
This table summarises when you might expect different side effects and how long they typically last.
| Side Effect | When It Starts | How Long It Lasts |
|---|---|---|
| Nausea, headache | Within hours to 2 days | Usually a few days; may improve with continued use |
| Breast tenderness | Within 3–5 days | Can persist during treatment; resolves after stopping |
| Spotting/breakthrough bleeding | Any time during treatment | Often intermittent; may settle after a few cycles |
| Mood changes (depression, irritability) | Days to weeks | Varies; usually improves after stopping |
| Acne, weight gain | Weeks to months | May persist with long-term use; reversible after stopping |
| Blood clot symptoms | Any time (rare) | Emergency – seek immediate help |
Contraindications: Who Should NOT Take Utovlan
Based on the PIL, Utovlan is not suitable for everyone. Do not take it if:
- You are allergic to norethisterone or any tablet ingredients (lactose, maize starch, etc.).
- You are pregnant, think you might be pregnant, or are trying to conceive.
- You have unexplained vaginal bleeding (not related to your period).
- You or a close family member have ever had a blood clot (DVT, pulmonary embolism).
- You have or have had heart problems (angina, heart attack) or stroke.
- You have liver disease (severe) or liver tumours.
- You have had jaundice or a blistering rash during a previous pregnancy.
- You have porphyria (a rare inherited blood disorder).
Also use with caution if you have epilepsy, migraine, asthma, kidney problems, or a history of depression – your doctor will assess the risks.
Food and Drug Interactions with Utovlan
Drug Interactions
Some medicines can affect how Utovlan works, or Utovlan can affect them. Tell your doctor if you take:
- Epilepsy medicines: phenytoin, carbamazepine – may reduce Utovlan's effectiveness.
- Antibiotics: rifampicin, tetracyclines, co-trimoxazole – may speed up breakdown.
- HIV medicines: ritonavir, nelfinavir – can alter levels.
- St John's wort (herbal remedy) – reduces effectiveness.
- Anticancer drugs – possible interaction.
- Ciclosporin – Utovlan may increase its levels.
- NSAIDs (ibuprofen, naproxen) – no major interaction, but always check.
- Blood pressure medicines – possible additive effects.
Food Interactions
- Grapefruit juice: May increase norethisterone levels by inhibiting liver enzymes; avoid large amounts.
- Alcohol: No direct interaction, but heavy drinking can affect liver function and increase dizziness. Moderation advised.
- General diet: No restrictions; can be taken with or without food.
Always check with your pharmacist or doctor before starting any new medicine or supplement.
Utovlan Side Effects FAQs
What are the most common side effects of Utovlan?
The most common are nausea, headache, breast tenderness, mood changes (including depression), and irregular bleeding or spotting. Most are mild and improve with time.
How soon after taking Utovlan can side effects start?
Side effects can start within the first few hours (e.g., nausea) or days (e.g., breast tenderness). Menstrual changes may take a few days to appear.
How long do Utovlan side effects last after stopping?
Most side effects resolve within a few days of stopping, as the drug is cleared (half-life 8–10 hours). Menstrual irregularities usually settle by the next cycle.
Can I drink alcohol while taking Utovlan?
There is no direct interaction, but heavy drinking may increase side effects like dizziness and affect your liver. Stick to moderate amounts.
Who should not take Utovlan?
Utovlan is contraindicated in pregnancy, history of blood clots, liver disease, unexplained vaginal bleeding, and allergy to norethisterone. See the full list in the contraindications section.
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Clinical References & Sources
Medical Content Manager
Nabeel is a co-founder, and medical content manager of Chemist Doctor. He works closely with our medical team to ensure the information is accurate and up-to-date.
Medical Doctor
Dr. Feroz is a GMC-registered doctor and a medical reviewer at Chemist Doctor. He oversees acute condition and urgent care guidance.
Medical Director
Usman is a co-founder, and medical director of Chemist Doctor. He leads the organisation's strategic vision, bridging clinical and operational priorities.
Review Date: 20 February 2026
Next Review: 20 August 2026
Published on: 20 February 2026
Last Updated: 20 February 2026