Homoeopathic remedies have no expiry date. It can be preserved for years, if kept away from moisture, strong smelling substances, magnetic field, and direct sunlight. Ideal place to keep homeopathic medicines is a wooden chest or a wooden cupboard. However, if you are taking a long stored medicine, please inspect the medicine thoroughly. If in case you find the color of the medicines have changed to dark brown / dark yellow or if you notice thin white hair like structure, avoid taking the medicines. Order fresh stock and discard the earlier stock.