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Diabetic retinopathy complications have been observed in some patients with pre-existing retinopathy who experience rapid improvements in glycemic control with semaglutide therapy
W., Wingler, K
Warning signs that need medical attention Seek medical evaluation within 24 to 48 hours if you experience: Redness that continues expanding beyond 48 hours after injection Redness diameter exceeding 10 centimeters Increasing pain (not decreasing) after 48 hours Warmth and hardness accompanied by fever above 100.4 F (38 C) Pus, drainage, or fluid oozing from the injection site Red streaks extending outward from the injection site (sign of lymphangitis) Reaction that has not shown any improvement after 7 days Seek emergency medical care immediately if you experience: Hives or rash spreading beyond the injection site to other body areas Swelling of the face, lips, tongue, or throat Difficulty breathing, wheezing, or shortness of breath Dizziness, lightheadedness, or feeling faint Rapid heartbeat Severe abdominal pain These emergency symptoms suggest a systemic allergic reaction (anaphylaxis), which is rare but documented with tirzepatide

NICE first recommended the drug in draft guidance 2022, after a clinical trial of just under 2000 volunteers found that people lost on average 12% more weight with semaglutide alongside supervised weight loss coaching (BMJ 2023;380:556)