Take all of the Emverm that has been prescribed for you even if you begin to feel better. Fasting, laxatives, and purging will not help cure this infection. Courses typically vary from one to several days. Avoid taking this medicine during the first months of pregnancy. Store Emverm at room temperature, between 59 and 86 degrees F (15 and 30 degrees C). It is important that you finish the course. Courses typically vary from one to several days. Be sure to keep all doctor and lab appointments. In general, Emverm has very few side effects. The number of tablets to take, how often and for how long will depend on the worm infection being treated.