EllaOne is one of the most effective forms of emergency contraception available, and many people choose it because it can be taken up to five days after unprotected sex. To feel fully informed, it is natural to want clear and reliable information about ellaOne side effects before using it. At Home Ground Pharmacy in Swindon, we offer friendly, confidential support to help you understand how ellaOne works and what you may experience.
The purpose of ellaOne is to delay or prevent ovulation, giving you the best possible chance of avoiding an unplanned pregnancy. While most people tolerate it well, every medicine can cause side effects. Knowing what is common, what is mild and what needs attention can make the experience far less stressful. EllaOne does not affect long-term fertility, and any side effects are usually short-lived.
Most EllaOne side effects are mild and settle without treatment. These reactions are usually a sign that your body is responding to the active ingredient, ulipristal acetate. Side effects often vary depending on when you take the tablet during your cycle, your general health and whether you are taking other medication.
–> Nausea or feeling queasy shortly after taking the tablet
–> Headaches that may last a few hours
–> Abdominal discomfort or cramping
–> Changes to your next period, including early, late or heavier bleeding
–> Fatigue or a feeling of low energy for a short time
These effects are usually temporary and rarely severe. Most people find they pass within a day or two. If vomiting occurs within three hours of taking ellaOne, it may not have been fully absorbed, and a second dose may be needed. In this situation, seeking professional advice is recommended so you can stay protected.
Some people experience less common side effects, but these are still generally mild. They may include mood changes, dizziness or breast tenderness. These reactions usually settle quickly and are not harmful. Your next period may also feel different from usual. This is a recognised effect of ellaOne and does not indicate long-term hormonal disruption.
If you experience prolonged discomfort or anything that feels unusual for your body, a pharmacist can offer reassurance and guide you on what to do next. For supportive advice that fits your personal situation, you are welcome to contact our team for clear and friendly guidance.

One of the most common concerns people have is how ellaOne may affect their next period. Your menstrual cycle may shift slightly, leading to early or late bleeding. Your period may also be lighter or heavier than normal. These temporary changes are a normal response to how ellaOne delays ovulation.
If your period is more than seven days late, it is important to take a pregnancy test. This does not mean ellaOne has failed, but checking ensures you have the right information and support. Emergency contraception can reduce the risk of pregnancy, but no method is 100% effective.
Serious reactions to ellaOne are extremely rare. Most people tolerate the medication well, and it has been widely used around the world for many years. However, very rare reactions can include severe abdominal pain or symptoms that do not improve. These may require further assessment, especially if pain occurs several weeks after taking the tablet.
If you notice anything that concerns you or feels significantly different from your normal health, Home Ground Pharmacy can support you. Our pharmacists can help you understand whether your symptoms are expected or whether further care is needed.

At Home Ground Pharmacy in Swindon, we understand that decisions about emergency contraception can feel sensitive, personal and sometimes overwhelming. Our team provides confidential, non-judgemental advice so you can feel supported at every stage. During your consultation, we will discuss how ellaOne works, potential side effects and what to expect afterwards.
If you would like reassurance before making your decision, you are welcome to call our experienced team for guidance that matches your circumstances. We aim to help you feel confident, informed and in control of your reproductive health.
Understanding ellaOne side effects can make the process feel far less stressful. Are you ready to get the emergency contraception you need or talk things through privately? Book now with Home Ground Pharmacy in Swindon for supportive, professional care.
This blog was written on behalf of Home Ground Pharmacy by Pharmacy Mentor.