 <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]  doctor if you are pregnant or plan to become pregnant. You should not become pregnant while using belladonna alkaloids/phenobarbital. This medication may harm an unborn baby. Ask about reliable forms of non-hormonal birth control (such as condoms, diaphragm with spermicide) while using this medication. If you become pregnant, talk to your doctor right away about the risks and benefits of this medication. This medication passes into breast milk and may have undesirable effects on a nursing infant. Consult your doctor before breast-feeding.The interactions of Phenobarbital-Hyoscyamine-Atropine-Scopolamine Oral: See also the How to Use section. 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 doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval. Some products that may interact with this drug include: darunavir, etravirine, potassium tablets/capsules, rilpivirine, sodium oxyb </s>