Administration of Singulair Singulair must be administrated exactly as your health provider has prescribed to you. Dont exceed or take a smaller dose or for a longer period of time than prescribed. The directions from the leaflet must be followed. Usually, for preventing symptoms of asthma or allergy singulair 10mg is used once in a day, desirable in the evening. In case of exercise-induced bronchoconstriction, one single dose should be taken before exercise or at least 2 hours. And during the next 24 hours dont take another dose. The instructions given by the doctor must be followed with precision. The oral granules may be swallowed alone or together with some food. As a liquid for mixing the Singulair granules can be used breast milk or baby formula, and no other. You can have any other liquid before or after administration of medication. After being opened or mixed, take them in no more than 15 minutes. The opened packet should not be kept for being used later. The whole regular pill must be swallowed with a full glass of water. The chewable one must be swallowed only after being chewed. An asthma attack in progression that has already started can not be treated by Singulair administration. In this case only inhalation medicine can be useful.