A four-week course of Ocid QRS, which contains the generic medication omeprazole, is a standard and appropriate treatment to reduce stomach acid and allow healing. Your symptoms, such as upper left-sided discomfort and nocturnal pain, are commonly linked to conditions like gastritis, acid reflux, or a mild peptic ulcer. These conditions are very common and highly treatable. Please take the medication as directed and avoid eating close to bedtime. If your symptoms do not improve, please consult your doctor for a detailed evaluation.