 <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]  start using dalteparin and each time you get a refill. If you have any questions, ask your doctor or pharmacist. This medication is given by injection under the skin as directed by your doctor, usually once or twice daily. Do not inject into a muscle. The dosage and length of treatment are based on your medical condition and response to treatment. The dosage may also be based on your weight for some conditions. This medication may also be given by injection into a vein by a health care professional, as directed by your doctor, for certain conditions. If you are using this medication at home, learn all preparation and usage instructions from your health care professional and the product package. Before using, check this product visually for particles or discoloration. If either is present, do not use the liquid. This medication should not be mixed with or added to any other medication. Before injecting each dose, clean the injection site with rubbing alcohol. Change the injection site each time to lessen injury under the skin. To minimize bruising, do not rub the injection site after a shot. Learn how to store and discard medical supplies safely. To prevent blood clots due to surgery, your doctor may direct you to start using this medication before or after surgery and continue for several days. Follow </s>