Valacyclovir is used to treat infections caused by certain types of viruses. In children, it is used to treat cold sores around the mouth (caused by herpes simplex) and chickenpox (caused by varicella zoster). In adults, it is used to treat shingles (caused by herpes zoster) and cold sores around the mouth.
Gastroenterology (MeSH heading)[1] is the branch of medicine focused on the digestive system and its disorders.
Gastroenterologists specialize in the evaluation, diagnosis, management, and treatment of the following symptoms and conditions: 1  Abdominal pain and discomfort. 2  Bleeding in the digestive tract. 3  Cancer (e.g., colorectal cancer, stomach [gastric] cancer, pancreatic cancer, liver cancer). 4  Constipation and diarrhea. minimum of 13 years of education and extensive training is required to become a gastroenterologist. Students interested in gastroenterology should focus on undergraduate courses in biology, chemistry, and mathematics.