You should take the medicine before or after meal, or during the day (2 - 3 hours after meal). Determination of time depends on what we want to achieve: expectoration, better apetite or to stimulate organs. Drugs against insomnia must be taken before bed time, at least one hour or hour and a half after dinner.
You shouldn't drink the cup of tea all at once, but slowly. This is how you will prevent tea to harm your stomach and it will have more efficiency. The best way of taking the potion is while it's warm, but sometimes drink it while it is really hot, especially if we want to achieve the perspiration. In most cases, herb medicines can be applied for three weeks or even the whole month.