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Clinical Evidence and Study Context Berberine studies predominantly involve small cohorts (30100 participants) with follow-up durations of 816 weeks

Very common side effects (affecting more than 1 in 10 people) include: Nausea, vomiting, and diarrhoea (usually temporary) Reduced appetite Common side effects (affecting up to 1 in 10 people) include: Constipation Abdominal pain or discomfort Headache Injection site reactions Fatigue Contact your GP promptly if you experience: Persistent or severe abdominal pain , particularly if radiating to the backthis may indicate pancreatitis Persistent vomiting that prevents adequate fluid intake Signs of dehydration : reduced urination, dizziness, dry mouth Symptoms of hypoglycaemia (if taking alongside insulin or sulphonylureas): trembling, sweating, confusion, rapid heartbeat Visual changes or eye pain, especially if you have diabetic retinopathy Unexplained weight loss exceeding expected therapeutic effect Mood changes or thoughts of self-harm Right upper abdominal pain, yellowing of skin/eyes, or dark urine which may indicate gallbladder problems Seek immediate medical attention (call 999 or attend A&E) if you develop: Severe, persistent abdominal pain with vomiting Signs of severe allergic reaction: difficulty breathing, facial swelling, severe rash Symptoms of diabetic ketoacidosis (particularly if insulin doses have been reduced): excessive thirst, frequent urination, confusion, fruity breath odour Severe hypoglycaemia with loss of consciousness Important safety information: GLP-1 medications are not recommended during pregnancy or breastfeeding

A 2020 study published in Regulatory Toxicology and Pharmacology found BPC-157 well-tolerated with no severe toxic effects across multiple animal species, supporting its safety profile for continued research
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