Nersin Oral drops homeopathic drug. Dosage adults: 15-20 drops 3-4 times daily. Young: 12-18 year 10-15 drops 3-4 times daily. Children: 6-12 year 8-10 drops 3 times daily. Small children: 1-6 year 5-8 drops 3 times daily. What homeopathic shelter... Read throughout product description by to press on buy button.