The dose of the Iverheal 12mg is not fixed. When you see your doctor and explain your problem, he or she will order tests. They will be interested to see how many parasites you have in your body. They even consider the patient's weight and life expectancy when prescribing Ziverdo kit. If you have missed your dose, contact your doctor as soon as possible. If a person's next dose is less than 12 hours away, they don't take the medicine. However, if the duration of the Iverheal 6mg is more than 12 hours, a person can take it. You should not worry if you do not feel any significant signs. However, there are several cases where a person passes out due to an overdose of medication.