Medication errors contribute to morbidity and mortality. They cost z. As the US health care system an estimated $ 177 billion (depending on the definition). Medication errors can be caused by incorrect selection of a drug or prescribing the wrong dose, frequency of use or duration Error reading recipe of the pharmacist, so that a wrong drug or wrong dosage is output error reading the drug container by the caregiver, so that an incorrect drug or a wrong dose will be given incorrect instruction of the patient incorrect administration by a doctor or a nurse or incorrect use by the patient incorrect storage of the medicinal product by the pharmacist or patient, so that the potency of the drug is changed using outdated drugs whose power is changed confusion of the patient so that the drug is not taken correctly Inaccurate transmission of prescription information between different providers prescribing errors are common, especially in certain patient groups. Older, women of childbearing age and children are especially at risk. Drug Interactions meet particular persons who take many drugs. To minimize the risk, doctors all taken by the patient drugs should also be caused by other prescribed and over the counter to know and keep a complete list of problems. Patients should be encouraged to keep a current list of their medicines and dosages and bring them at every visit or in the emergency room. If there is confusion about the drug used, the patient should be instructed to bring all medicines to check with their doctor visits. Recipes must be written as clearly as possible. Because the names of some drugs are very similar, it can – if it is not written clearly – to get confused. The reorganization of some common, but confusable spellings can also lead to a reduction of errors. For example, “qd” can (once daily) are confused (4 times daily) with “qid”. The notation “once a day” or “once a day” is preferable. By electronically transmitted or with the computer printed regulations problems with illegible handwriting or inadequate abbreviations can be avoided. However, use increase electronic regulation systems which check boxes or selection lists, the risk that inadvertently an incorrect drug or improper dose will be selected. It is possible that drugs are not administered properly, especially in institutions. A drug may be administered to the wrong patient, wrong time or in the wrong dosage form. Certain drugs must at i.v. Delivery slow and some drugs can not be administered simultaneously. If an error is detected, this should be reported to a doctor immediately and a pharmacist be consulted. Bar codes and computerized pharmacy systems can reduce the incidence of medication errors. To ensure the potency of drugs, medicines should be stored by pharmacists. Mail-order pharmacies should comply with established procedures to ensure proper transportation. Storage by the patient is often suboptimal. When not properly stored, it is likely that the potency of drugs decreases long before the specified expiration date. The label should clearly indicate whether a drug in the refrigerator or cool has to be stored, must be protected from excessive heat or sun or requires other special storage. On the other hand, unnecessary precautions reduce the compliance and waste the time of the patient. For example, unopened insulin in the refrigerator should be kept. An opened bottle, however, can be safely stored relatively long outside the refrigerator when exposed to excessive heat and sun. There is widespread use of outdated medicines. Outdated medicines may be ineffective or harmful (eg., Aspirin, tetracycline). Often based medication errors that the patient is not clear how the drug is to be taken. Patients can use the wrong drug or wrong dosage. The patient should be fully explained the dosage instructions and the basic Regulation for each drug and, if possible, be given in writing. Patients should be advised to seek advice from their pharmacist also about taking their medicine. The packaging should be practical yet safe. If children do not have access to the drugs and patients having difficulty opening the package could have, packaging should be used without parental control. Another common source of error is inaccurate transmission of prescription information if the care of the patient is transferred from one device to another (eg. As from the hospital to a rehab facility, the nursing home to a hospital or by a specialist to a family doctor). Usually, it is expensive to ensure communication between different institutions, and changes to a dosage schedule are common when taking care of a patient is transferred. A greater appreciation of communication can help to reduce the risk of such errors. The risk was reduced by various formal programs for coordination of drugs such. As the fact that a complete list of current medicines is always prepared when a patient is transferred from one device to another.