Cold symptoms are part of your body's healing processes. Most of the time, it does not require any help. However, you can get rid of a cold faster. How to use 12 Hour Cold Relief Mg Tablet,Extended Release ; If you are taking the over-the-counter product to self-treat, read all directions on the product. You can buy cough and cold medicines from pharmacies or supermarkets. germs from coughs and sneezes, which can live on hands and surfaces for 24 hours.