Tetrazole is a five-membered ring compound containing four nitrogen atoms and one carbon atom. It is a heterocyclic compound, meaning it has a ring structure that includes different elements. Tetrazoles are known for their stability and are used in various applications, including pharmaceuticals and as precursors in organic synthesis. In the pharmaceutical industry, tetrazoles are often found in drug formulations due to their ability to mimic carboxylic acids. They can enhance the solubility and bioavailability of certain medications. Notable examples include Losartan, an antihypertensive drug, which contains a tetrazole moiety in its structure.