“Any sufficiently advanced technology is indistinguishable from magic.” -Arthur C. Clarke

For a long time, advanced medical treatments sounded like a thing of the future. But today, scientists are developing technology that is so small that it could one day traverse the human body itself.

Scientists are creating tiny machines called ‘nano robots.’ They are extremely tiny and are designed to move inside the body to help doctors deliver medicine or detect diseases. One of the main goals of nano robots in medicine is targeted drug delivery. Currently, conventional methods require the medicine to travel throughout the body: nano robots could instead bring the medicine directly to the area where the disease or tumor is located.

Why focus on targeted drug delivery?

Some types of medicines can damage healthy living cells. By having the medicine delivered directly to the tumor or site where the disease resides, doctors can use smaller doses and achieve the same—if not better—results.

Are they actually being used? 

According to a 2023 review in Precision Nanomedicine, researchers are studying nano robots for targeted drug delivery, cancer treatment, diagnostics and single cell surgery, but most of this technology is still in laboratory testing.

What challenges do researchers face?

According to Shafique et al. (2025), major obstacles still exist. These include immune system reactions, difficulty in controlling the nano robots inside the body and the high costs when it comes to manufacturing these nano robots.

What does the future look like?

Scientists believe that the next major steps for nano robots will be improving their safety, lowering their manufacturing costs and finding safe methods to control the robots inside the human body. Many researchers are also looking at how they can incorporate artificial intelligence to guide the nano robots more precisely.

In sum, while nano robots highlight how far the medical field has advanced in terms of technology, they also prove how much work is still left. The idea of nano robots curing diseases may sound like something from the future, but it is becoming a serious focus of modern medical research.