Taking emergency contraception can feel overwhelming, particularly when you are unsure what to expect in the hours and days that follow. EllaOne (ulipristal acetate) is a highly effective emergency contraceptive pill available from pharmacies without a prescription, but like all medicines, it can cause side effects. Understanding what changes are normal and when they should resolve can help you feel more informed and reassured during a stressful time.
Our team at Nettles Pharmacy is here to support you. If you have questions about emergency contraception or want to speak to someone in confidence, contact us or call our team at Nettles Pharmacy in Tooting today.
What Is EllaOne and How Does It Work?
EllaOne contains ulipristal acetate, which works by delaying or inhibiting ovulation. It must be taken within 120 hours (five days) of unprotected sex, though it is most effective the sooner it is taken. Because it influences hormone levels, particularly progesterone, it is entirely expected that it may temporarily alter how you feel physically and affect your menstrual cycle.
EllaOne Side Effects: A Step-by-Step Timeline
Step 1: Within the First Few Hours
Most people tolerate EllaOne well, but some notice side effects fairly quickly after taking the tablet. Common experiences in the first few hours include:
- Nausea or an unsettled stomach
- Headache or dizziness
- Tiredness or fatigue
- Abdominal discomfort or cramping
If you vomit within three hours of taking EllaOne, you should speak to a pharmacist promptly, as you may need a replacement dose.
Step 2: The First 24 to 48 Hours
Nausea is the most commonly reported side effect and typically peaks within the first day or two. Breast tenderness may also begin during this window. These symptoms are a direct result of hormonal changes triggered by the medication and do not indicate anything has gone wrong.
Taking EllaOne with food or a light snack can help reduce nausea, though it should not affect the effectiveness of the pill.
Step 3: Days 3 to 7
For many people, the physical side effects begin to ease by this point. However, you may start to notice:
- Spotting or light irregular bleeding
- Continued breast tenderness
- Mood changes or emotional sensitivity
- Bloating
These changes are linked to the shift in progesterone caused by ulipristal acetate. Light spotting at this stage does not necessarily mean the pill has failed.
Step 4: Your Next Period
EllaOne often affects the timing of your next period. Your next period may arrive earlier or later than expected after taking emergency contraception. Most people experience their period within a week of the expected date.
If your period is more than seven days late, or if it is significantly lighter than usual, it is worth taking a pregnancy test or speaking to a healthcare professional. You can book an appointment with our team in Tooting if you need support.
Side Effects at a Glance
| Timeframe | Common Side Effects | What to Do |
|---|---|---|
| First few hours | Nausea, headache, dizziness, stomach cramps | Take with food; rest if needed |
| 24 to 48 hours | Continued nausea, breast tenderness, fatigue | Stay hydrated; monitor symptoms |
| Days 3 to 7 | Spotting, bloating, mood changes | Note any bleeding; contact us if concerned |
| Around your next period | Earlier or later period, lighter or heavier flow | Take a pregnancy test if period is over 7 days late |
Hormonal Changes to Be Aware Of
EllaOne specifically targets progesterone receptors to delay ovulation. This temporary hormonal disruption is what causes many of the side effects listed above. It does not affect your long-term fertility or hormonal balance. Your cycle should return to its normal pattern within one to two months.
Frequently Asked Questions About EllaOne
Yes. Nausea is one of the most common side effects and usually passes within 24 to 48 hours. Taking the tablet with food can help ease discomfort.
Most side effects are short-lived and resolve within a few days. Cycle changes may persist until your next period, which could arrive a little earlier or later than usual.
If you use hormonal contraception such as the pill, patch, or ring, EllaOne may reduce its effectiveness. You should use additional barrier contraception, such as condoms, for at least 14 days after taking EllaOne. Speak to a pharmacist or GP for advice specific to your method.
EllaOne is not intended for regular use. If you have had unprotected sex more than once in the same cycle, speak to a healthcare professional about your options, including longer-term contraception.
Not necessarily. Light spotting or irregular bleeding in the days after taking EllaOne is common and is caused by hormonal changes rather than treatment failure. If you are concerned, a pregnancy test after your next expected period is the most reliable way to confirm effectiveness.
If your next period is more than seven days late, or significantly lighter than normal, it is advisable to take a pregnancy test. You can also visit or contact us at Nettles Pharmacy in Tooting for guidance.
No. EllaOne does not affect your long-term fertility. The hormonal changes it causes are temporary and your body’s natural cycle should return to normal within one to two months.
Support at Nettles Pharmacy, Tooting
Taking emergency contraception is a personal decision, and you deserve clear, judgement-free support. Our team in Tooting is available to answer questions, help you understand your options, and guide you through next steps if needed.
If you are unsure whether EllaOne is right for you, or if you would like to discuss ongoing contraception options, reach out to us or book an appointment with our pharmacy team today.
