 <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]  for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.The precautions of Valstar Intravesical: Before using valrubicin, tell your doctor or pharmacist if you are allergic to it; or to other anthracyclines (such as doxorubicin); or if you have any other allergies. This product may contain inactive ingredients (such as polyoxyethylated castor oil), 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: small bladder size or other bladder problems (such as perforation, incontinence), current urinary infection/symptoms of bladder irritation (including pain, spasm, frequent urge to urinate). Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products). Tell your doctor if you are pregnant or plan to become pregnant. You should not become pregnant while using valrubicin. Valrubicin may harm an unborn baby. Men and women using this medication should ask about reliable forms of birth control during treatment. </s>