But how would you know if an online pharmacy can be trusted? It is important to know how you can check the reliability of your online vendor eupharmcenter.com. For example, if you need to buy a prescription drug, you must never use an online drugstore that does not ask for a prescription. You should also avoid any pharmacy that has customer support which is difficult to reach. You also might want to check the terms and conditions of the online vendor, to make sure that guarantee policy and refund policy are both in place.