 <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]  not start, stop, or change the dosage of any medicines without your doctor's approval. Some products that may interact with this drug include: bisphosphonates (such as alendronate), tetracycline antibiotics (such as doxycycline, minocycline), quinolone antibiotics (such as ciprofloxacin, levofloxacin), calcium channel blockers (such as diltiazem, verapamil), digoxin, fezolinetant, phosphate supplements (such as potassium phosphate), quinidine, raltegravir, sodium polystyrene sulfonate, thyroid medicine (such as levothyroxine). Some products need stomach acid so that the body can absorb them properly. Famotidine decreases stomach acid, so it may change how well these products work. Some affected products include atazanavir, dasatinib, certain azole antifungals (such as itraconazole, ketoconazole), levoketoconazole, pazopanib, sparsentan, among others. Do not take this medication with other products that contain famotidine or other H2 blockers (cimetidine, </s>