 <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]  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: retinoid medications taken by mouth (such as acitretin, isotretinoin), barbiturates (such as phenobarbital), "blood thinners" (such as warfarin), digoxin, anti-seizure medications (such as phenytoin), strontium. This medication may interfere with certain lab tests (such as urine catecholamine levels), possibly causing false test results. Make sure lab personnel and all your doctors know you use this drug. Does Doxycycline Hyclate Tablet Tetracyclines interact with other drugs you are taking? Enter your medication into the WebMD interaction checker Check InteractionThe overdose of Doxycycline Hyclate Oral: If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call their local poison control center at 1-800 </s>