When you have diarrhoea, which drugs come to your mind? I bet tetracycline, flagyl or both?
Did you ever take the tetracycline with milk, or soon after taking the milk? Aaah! If you did, am so sorry, what a waste! What do I mean?
Milk is a diary product rich in calcium. Tetracycline and similar drugs are calcium chelators, that is, they bind to free Calcium in the body and form a complex that is not useable by the body for the intended purpose. So, when you take tetracycline and calcium (milk) at the same time, because the complex formed cannot be used by the body, the drug is eventually excreted from the body without achieving the aim of using it in the first place.
OTHER TIPS: Do not take dairy products (milk, soya), antacids (e.g. Mistmag), or iron preparations (e.g. blood tonic) within one hour of taking tetracyclines