Hello, I'm a healthcare professional with expertise in pharmacology. I can provide you with information on the side effects of lansoprazole. Lansoprazole is a type of medication known as a proton pump inhibitor (PPI) that is commonly used to treat conditions caused by excess stomach acid such as gastroesophageal reflux disease (GERD), peptic ulcers, and other gastrointestinal issues. While lansoprazole is generally well-tolerated, it can cause a range of side effects in some individuals. Common side effects of lansoprazole may include: 1. Headache 2. Diarrhea 3. Nausea 4. Gas 5. Abdominal pain 6. Dizziness **Less common but potentially serious side effects** may include: 1. Severe allergic reactions (rash, itching, difficulty breathing, swelling of the face, lips, tongue, or throat) 2. Serious heartburn 3. Unexplained weight loss 4. Nosebleed 5. Fever or chills 6. Fast or irregular heartbeat 7. Vision changes 8. Severe stomach pain 9. **Tar-colored stools or vomit that looks like coffee grounds** Rare but serious side effects that require immediate medical attention include: 1. Signs of a low vitamin B-12 level (numbness or tingling in hands or feet, muscle cramps, weakness) 2. Signs of a magnesium deficiency (seizures, jerking muscle movements, irregular heartbeat, uncontrolled muscle or nerve pain) 3. Signs of a low sodium level (confusion, hallucinations, severe or persistent headache, seizures, unsteadiness) 4. **Bone fractures (especially in the hip, wrist, or spine)** 5. Osteoporosis 6. **Clostridium difficile-associated diarrhea** (severe diarrhea that may not improve after treatment with antibiotics) It's important to note that not everyone who takes lansoprazole will experience these side effects, and some people may not experience any at all. If you are concerned about side effects, it's always best to discuss them with your healthcare provider. read more >>

Stop using lansoprazole and call your doctor at once if you have symptoms of low magnesium:dizziness, confusion;fast or uneven heart rate;jerky muscle movements;feeling jittery;diarrhea that is watery or bloody;muscle cramps, muscle weakness or limp feeling;cough or choking feeling; or.seizure.read more >>