To conduct a randomised, placebo-controlled, blinded, clinical discontinuation trial, 500 long-term users of acid-suppressive drugs are identified by general practitioners. Long-term use is defined as treatment for more than 2x28 days during a 6-month period. The patients are included with a 13C-urea Hp-breath test and randomised for treatment with PPI or placebo. Hp-positive patients are treated with an Hp-eradication treatment. The patients are followed for 1 year; the primary outcome is the need for open treatment with acid-suppressive medication due to failing symptom relief despite treatment with the randomised project medication. The patients are to fill in a symptom and medication diary every month for periods of 1 week. Questionnaires are to be given to the patients 3 times during the follow-up period. Medication diaries as well as questionnaires have proven useful in similar studies. The main outcome is analysed using Kaplan-Meier survival estimates analysis.