 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST] .The interactions of Havrix (PF) Intramuscular: Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your health care professional. Do not start, stop, or change the dosage of any medicines without your doctor's approval. Some products that may interact with this vaccine include: drugs that weaken the immune system (including cyclosporine, tacrolimus, cancer chemotherapy, corticosteroids such as prednisone). Other vaccines may be given at the same time as hepatitis A vaccine, but should be given with separate syringes and at different injection sites. Does Havrix Vial interact with other drugs you are taking? Enter your medication into the WebMD interaction checker Check InteractionThe overdose of Havrix (PF) Intramuscular: Not applicable.  Notes As with any vaccine, this vaccine may not fully protect everyone who receives it. Hepatitis A spreads very easily, often through contaminated food or water, infected food handlers, sexual contact with an infected individual, eating raw shellfish from contaminated water, </s>