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Can Tetracyclines change the color of stool?
Good morning, for 3 days I have been taking tetracycline for acne problems (Tetracycline TZF 250mg) at a dose of 2x2tabl. I immediately noticed a change in the color of the stool - on the first day, due to the fact that it was very compact, it seemed black, today - on the third day, when its structure was a bit looser, the color was more dark green. Other ailments from the digestive system such as nausea, abdominal pain, appetite problems - none. Is the change in stool color a cause for concern, or is it a natural reaction of the body to the composition of the drug?
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Anna Tyrańska Pharmacist, Editor
9 months ago
Yes, tetracyclines, which are a group of antibiotics, can sometimes affect the coloration of the stool. As a result of taking tetracyclines, the stool may change color to a darker color, or brownish-black stains may occur. However, this is a relatively rare side effect, besides - it does not adversely affect the patient's health or the effectiveness of treatment. After the end of the treatment, everything should return to normal. At the following link you can check the availability of the drug in pharmacies in Polish: https://www.gdziepolek.pl/produkty/78289/tetracyclinum-tzf-tabletki-powlekane/apteki https://www.gdziepolek.pl/kategorie/tradzik