How does the medicine know where to go in the body and which disease to cure? Click here to know!


When we feel pain or illness or discomfort in any part of the body then we all take some pill. But have you ever stopped and wondered how a tiny pill can understand which part of your body is going through pain or pain and which part to treat? Well, most of us would not have even thought in this direction.


Usually, we take medicines orally. Only sometimes, in case of severe conditions, that medicines are injected inside us or sometimes directly applied to the affected area. In all other conditions, for every pain or body condition, we take the medicine orally only with water.

So how do medicines know which part of the body they have to go to? Throwing light on this process, a pharmaceutical scientist said what happens once a drug enters the human body. When you take aspirin for a headache, how does the aspirin know to travel to your head and ease the pain?

Other types of components in drugs are designed and developed to make the drug more effective in a specific part of the body, explains Tom Ancherdoqui, a professor of pharmaceutical sciences at the University of Colorado Anschutz Medical Campus, in his article in Conversations. To understand this, it is important to understand how medicines work in the body.

How do drugs know where to go in the body?

Whenever we swallow a medicine, it first dissolves in the stomach and intestines. After this, the drug molecules get mixed in the bloodstream, due to which they go to every organ and tissue of the body. The drug molecules affect the binding receptors of cells that initiate a particular response.

For example, aspirin, a well-known drug used for headaches, also contains substances that do not break down during transport, whereas such drugs dissolve once taken by mouth. Drug molecules affect the body by binding to various receptors on cells that can trigger a particular response.

How do drugs behave once inside the body?


Medicines taken by mouths such as tablets, capsules, caplets, powders, or liquids are first swallowed with water. It then travels through the esophagus to the stomach. Once in the stomach, a drug dissolves in acid and then flows into the small intestine.

Side effects of drugs:

Although drugs are designed with specific receptors in mind to produce desirable results, it is not possible to prevent them from traveling through the bloodstream to other parts of the body. For this reason, we get to see the side effects of the medicine by going to non-essential places. The effect of the medicine becomes lighter with time and it also comes out through urine, that is why after taking many medicines, there is a bad smell in the urine, then after taking some medicines, the color of urine becomes more yellow.