 <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]  to use Hydromorphone HCL Vial Depending on your specific product, this medication is given by injection under the skin, into a muscle, or slowly into a vein. Use exactly as directed by your doctor. Learn the proper way to give injections. If you have any questions about using this medication properly, consult your doctor or pharmacist. Before using, check this product visually for particles or discoloration. If either is present, do not use the liquid. Before injecting each dose, clean the injection site with rubbing alcohol. If this medication is given into a muscle or under the skin, it is important to change the location of the injection site with each dose to avoid problem areas under the skin. Use needles and syringes only once. Learn how to discard needles and medical supplies safely. Some brands of this medication contain more than 1 dose. Some brands contain only 1 dose. Review the use of the product you have been prescribed with your pharmacist. If your doctor has directed you to use a single-dose brand, use it for only 1 dose. Do not save any medication remaining in the package. Consult your pharmacist for more information. The dosage is based on your medical condition and response to treatment. Pain medications work best if they are used when </s>