Amoxicillin trihydrate is widely used in the medical field as an antibiotic to treat a variety of bacterial infections. It is effective against infections of the respiratory tract, such as pneumonia and bronchitis, as well as ear, nose, and throat infections like sinusitis and otitis media. Additionally, it is prescribed for urinary tract infections, skin infections, and certain gastrointestinal infections caused by Helicobacter pylori, often in combination with other medications.

In veterinary medicine, it is also utilized to treat bacterial infections in animals, including livestock and pets. Its broad-spectrum activity makes it a common choice for combating Gram-positive and some Gram-negative bacteria.

Amoxicillin trihydrate is often preferred due to its stability, bioavailability, and relatively low incidence of side effects, making it a first-line treatment in many clinical scenarios. It is available in various forms, including tablets, capsules, and oral suspensions, to accommodate different patient needs.