 <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]  during photopheresis by a health care professional. This medication is used as directed by your doctor, usually once a day for 2 days in a row. Photopheresis is usually repeated every 4 weeks depending on your response to treatment. Dosage is based on your medical condition, the amount of white blood cells collected, and response to treatment.The side effects of Uvadex Injection: See also Precautions section. Dizziness, headache, weakness, leg cramps, or bitter/sour taste in the mouth may occur. Skin freckling, dry skin, and skin aging may also occur. If these effects last or get worse, tell your doctor or pharmacist promptly. Remember that this medication has been prescribed because your doctor has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects. Tell your doctor right away if you have any serious side effects, including: depression, swollen ankles/feet, new/unusual skin sores, irregular heartbeat. A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any of the following symptoms of a serious allergic reaction: rash, itching/swelling (especially of </s>