 <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]  that it may harm an unborn baby. If you have been vaccinated with varicella virus vaccine, you should not become pregnant for at least 3 months after the vaccination. Discuss the possible risks with your health care professional. It is unknown if the varicella virus in this vaccine passes into breast milk. Consult your health care professional before breast-feeding.The interactions of Varivax (PF) Subcutaneous: 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), certain antiviral drugs (such as acyclovir, famciclovir, and valacyclovir). All children and teenagers should avoid aspirin or aspirin-like medications (such as salsalate) for 6 weeks after vaccination. Postp </s>