Serious. These medicines may interact and cause very harmful effects. Contact your healthcare professional (e.g. doctor or pharmacist) for more information.
How the interaction occurs:
Medicines that decrease the amount of acid in your stomach may prevent your body from absorbing ulipristal.
What might happen:
Ulipristal may not be as effective if you are taking medicines such as antacids, H2 antagonists, or proton pump inhibitors.
What you should do about this interaction:
Make sure your healthcare professionals (e.g. doctor or pharmacist) know that you are taking these medicines together. Discuss your options with your healthcare provider.Your healthcare professionals may already be aware of this interaction and may be monitoring you for it. Do not start, stop, or change the dosage of any medicine before checking with them first.Reference:1.Ellaone (ulipristal acetate) UK summary of product characteristics. HRA Pharma UK Ltd May 15, 2009.