 <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] da.gov/medwatch. In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.The precautions of Doxycycline Monohydrate Oral: See also Side Effects section. Before taking doxycycline, tell your doctor or pharmacist if you are allergic to it; or to tetracycline or related drugs (such as minocycline); or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details. Before using this medication, tell your doctor or pharmacist your medical history, especially of: kidney disease, liver disease, problems swallowing, esophagus problems (such as hiatal hernia, reflux disease-GERD), stomach surgery (such as gastrectomy, gastric bypass surgery), lupus. Doxycycline may cause live bacterial vaccines (such as typhoid vaccine) to not work well. Tell your health care professional that you are using doxycycline before having any immunizations/vaccinations. This medication may make you more sensitive to the sun. Limit your time in the sun. Avoid tanning </s>