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It is not recommended to take tetracycline and vitamin B12 simultaneously, and the reason is that tetracycline will interfere with the effectiveness and absorption of vitamin B12
It also improves insulin sensitivity, which is key for reversing PCOS symptoms like weight gain, cravings, fatigue, and irregular periods
Step 3: Gather quick details (helps your doctor) Write down: When it started How many black stools you had Any meds/supplements (iron, bismuth, blood thinners) Any symptoms (dizzy, weak, short of breath) When to see a doctor (and when its an emergency) Emergency (same day / now) Black, tarry stool plus symptoms (dizziness, fainting, weakness, shortness of breath) Vomiting blood or coffee-ground vomit Large amount of black stool or repeated episodes Call a doctor soon Black stool that keeps happening No clear reason (no iron, no Pepto-Bismol, no dark foods) Signs of anemia like tiredness, pale skin, shortness of breath Diagnosis: what gastroenterology may do If bleeding is possible, you may be referred to gastroenterology (digestive system care)
2012 Nov;67(11):1140-52
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