How long after taking a couple of teaspoons of a cough bottle can you start drinking water?

read the label the medicine needs time to work on the larnys, throat, etc, wherever there is swelling or redness, infection, etc, so if you take your medicine and drink right away, you wash away the therapeutic medicinal effect of the medicine a suggestion is to take one teaspsoon upon coughing, rtelax, and as you feel beeter and stop coughing, a lorenger for added reflief