Hyopan is an antispasmodic syrup containing hyoscine butylbromide, used to treat painful spasms of the stomach, intestines and bladder. The 5ml/5ml concentration is suitable for both adults and children over 6 years of age under proper medical supervision. This medication works by relaxing smooth muscles to relieve cramping and spasms in the digestive and urinary systems. It should not be used in patients with glaucoma, myasthenia gravis, enlarged prostate, or bowel obstruction. Common side effects may include dry mouth, dizziness and blurred vision. The syrup should be stored at room temperature away from direct light and moisture. Always consult your healthcare provider for proper dosing instructions based on your specific condition.