A drug is any chemical substance that causes a change in an organism's physiology or psychology when consumed. Antibiotics are medicines that fight bacterial infections in people and animals. They work by killing the bacteria or by making it hard for the bacteria to grow and multiply. The antibiotic can class according to structure or action or basic. Every drug have side effects on body if use If taken incorrectly.

Nanomaterials or nanoparticles (NPs) are nano-size particles with a (1-100) nm dimension, they show unique properties such as magnetic, electronic, optical, and activating effects. That is why NPs have many applications. Titanium dioxide (TiO2) or Titania based nanoparticals are commonly used NPsdue to their medical and industrial applications. TiO2NPs are used in photodynamic therapy (SDT) and drug delivery due to their non-toxicity. In this review paper we will show some of the types, synthesis methods, and applications of nano-TiO2.