**Terve Tab 20S** appears to be a pack of 20 tablets under the Q10 Power “Terve.” However, without specific information about the active ingredient or the intended use of the tablets, it is challenging to provide a detailed description.

If you have more information about what the tablets are used for (e.g., treating a specific condition) or the active ingredient in them, I can give you a more precise description. For accurate and detailed information, especially regarding usage, side effects, and contraindications, it’s best to consult with a healthcare professional or check the product’s packaging.