Chemical Drug plays the major role in healing and recovering of the patient’s using illnesses. But in this technological Era the Drug which we are using consists of chemicals that are more than the permissible limit, Because of High content of chemicals present in the Drug, it leads to several other health complications, like Heart failure, Liver and kidney Damage. This paper reviews on the development of a rapid sensing mechanism to detect harmful chemicals such as alcohol, benzene, and other volatile compounds commonly used in drugging crimes. The study employs MQ2, MQ3, and MQ9 gas sensors, which are specifically designed to detect a wide range of chemicals. MQ2 is effective for detecting gases like smoke, methane, and LPG, while MQ3 is sensitive to alcohol, and MQ9 can identify carbon monoxide and combustible gases.