Stomach pain after taking potassium supplements may be caused by potassium ions irritating the mucous membrane of the gastrointestinal tract. The following measures can be taken: adjusting the time of taking the medicine, adjusting the dosage form of the medicine, taking the medicine to relieve the symptoms, and changing to other ways of potassium supplementation. 1. Adjusting the time of taking medication: taking potassium medication on an empty stomach will increase the stimulation of the gastric mucosa, and potassium medication can be taken 30-60 minutes after meals to reduce the stimulation of the gastric mucosa by potassium ions. 2. Adjust the dosage form of the medicine: ordinary potassium tonic medicine will be disintegrated rapidly after reaching the stomach, and the stimulation to the gastric mucosa is relatively large. You can choose the dosage form that releases the drug slowly to reduce the stimulation of the gastric mucosa, such as potassium chloride slow-release tablets. 3. Take medicines to relieve symptoms: you can take some gastric mucous membrane protection preparations to protect the gastric mucous membrane and reduce the stimulation of medicines. Such as: aluminum thiosulfate, bismuth potassium citrate, etc. For excessive gastric acid caused by drug stimulation of gastric mucosa, proton pump inhibitors can also be taken to inhibit gastric acid secretion, such as: omeprazole, rabeprazole, etc. 4. Change to other ways of potassium supplementation: If the symptoms of abdominal pain are more serious and the above treatments are ineffective, it is necessary to stop taking oral medication, and there are other ways of potassium supplementation, e.g. intravenous infusion of potassium chloride injection. Adjustment of drug dosage form and administration method should be carried out under the guidance of clinicians to avoid adverse effects.