Flunahist 5mg Tablet is a medicine used for the prevention of migraines. However, it cannot treat an acute attack and will only work to prevent migraines for as long as you continue to take the medicine. This medicine relaxes the brain, preventing migraine headaches. Flunahist 5mg Tablet may be taken with or without food. However, it is advised to take it at the same time each day as this helps to maintain a consistent level of medicine in the body. Do not skip any doses and finish the full course of treatment even if you feel better and if you have missed a dose, take it as soon as you remember. You should continue to take this medicine for as long as the doctor advises and do not stop taking it suddenly. Side effects associated with the use of this medicine include muscle pain, fatigue, constipation, nausea, insomnia (difficulty sleeping), and runny nose. Some other side effects that may be seen on taking this medicine are increased appetite, depression, stomach discomfort, and breast pain. It may also cause sleepiness at the beginning of your treatment, so do not drive, operate machinery, until you know how this medicine affects you. It may also cause weight gain and to prevent it you can eat a healthy balanced diet and should exercise regularly. This medicine may cause changes in your mood and you may feel depressed, therefore, regular monitoring of behavior is important. Pregnant or breastfeeding mothers should consult their doctor before taking this medicine.