Nexium Control 20 mg gastro-resistant tablets contain esomeprazole, a proton pump inhibitor (PPI) that reduces the amount of acid produced by the stomach. It is for the short-term treatment of reflux symptoms, such as heartburn and acid regurgitation, in adults aged 18 years and over. Symptoms may take 2-3 consecutive days of treatment to improve; it is not intended to give immediate relief. Do not use for longer than 14 days without speaking to a doctor. Speak to your doctor before use if you have had a stomach ulcer or stomach surgery, are taking other medicines, or have alarm symptoms such as significant unintended weight loss, difficulty swallowing, persistent vomiting, vomiting blood or black stools. Not for use in those under 18, in pregnancy or while breastfeeding without medical advice - speak to your pharmacist or doctor. Our pharmacist is available for advice. Always read the label and the patient information leaflet before use.