The threats and risks of the invalid drugs as expired, counterfeit (cheated drugs), Substandard, spurious, falsely labeled, falsified) .The risks and threats of the invalid drugs are many and wide vary, and the countries are trying to prevent these threats by some efforts as the regulatory institution\'s efforts and the recorded expire date on the drug container, but that are not enough to prevent this problem. As well as, the recorded expire date on the drug container can be cheated and not accurate, too. As it depends on the assumption the drug may be valid till this date if the drug is made and stored in an ideal manner, but in the real conditions the drug may expose to different conditions that may effect on its expire date and validity, as the environmental conditions e.g. light and temperature. So, in this research I found some answers about the people and invalid drug, and about the trust in drug use and safety, and I developed an additional, simple, rapid and a more accurate way to distinguish between the valid drugs and the invalid drugs that is suitable for public people, to decrease these threats and increase drug and patient safety.
