 <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] , coughing up blood, sudden dizziness/fainting. This medication can lower the body's ability to fight an infection. Tell your doctor promptly if you develop any signs of an infection such as sore throat that doesn't go away, fever, or chills. A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing. This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist. In the US - Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.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 Estramustine Oral: Before taking estramustine, tell your doctor or pharmacist if you are allergic to it; or to estradiol or other estrogens; or to nitrogen mustard </s>