Hi, Zentel is a brand name for the drug Albendazole, which is an anthelmintic medication used to treat various parasitic infections. This medication is used to treat a variety of parasitic infections, including tapeworm, pinworm, hookworm, and whipworm. It works by preventing the worm from absorbing glucose, which is essential for the worm s survival. The reason you have been advised to take Zentel may be related to a parasitic infection that you may have. However, as you mentioned that you are undergoing several tests and have received differing diagnoses, it is essential to speak with your doctor to understand the specific reason for being prescribed Zentel. Regarding the other medications you are taking, Tab Romox 625 contains amoxicillin and clavulanic acid and is typically used to treat bacterial infections. Tab Vibact DS contains a combination of different probiotics, which help restore the natural balance of bacteria in the gut. It is important to note that while antibiotics are effective in treating bacterial infections, they can also disrupt the natural balance of bacteria in the gut. This is where probiotics like Vibact DS come in, to restore the balance of beneficial bacteria in the gut and prevent further complications. In summary, Zentel is a medication used to treat parasitic infections. The reason for its prescription may be related to a parasitic infection, but it is important to consult with your doctor to understand the specific reason. Additionally, the other medications you are taking, such as Romox 625 and Vibact DS, are used to treat bacterial infections and restore gut health, respectively. If you require a personalized response, kindly use the Ask A Doctor service and post a follow-up. Take care. Hope I have answered your question. Regards, Dr. Priyanka, General & Family Physician