Which of the following is a combination drug that contains an anti-infective drug (bismuth), an antibiotic drug (tetracycline), and an antiprotozoal drug (metronidazole) and is used to treat H. pylori infection of the stomach

Helidac

Explanation:

H. pylori infection of the stomach such as ulcers, which can also lead to stomach cancer, is caused by the bacteria called Helicobacter pylori (H. pylori). These gram-negative bacteria, that have a helical shape, enter the body and are mostly found in the digestive tract. This bacteria causes infection by penetrating the mucoid lining of the stomach, which protects the wall of your digestive system from being damaged by the acid produced by the digestive tract. When this lining of the stomach is being attacked, it gives chance for acid to act thereby causing sores which leads to ulcers.

Effective treatment of H. pylori infection involves the use of the combination of drugs which is sometimes called the triple treatment. One of such drugs is Helidac, which contains an anti-infective drug (bismuth), an antibiotic drug (tetracycline), and an antiprotozoal drug (metronidazole) in a combined form, used in killing H. pylori as well as reduce the amount of acid produced by the stomach to enable the stomach lining heal properly.