Don't take it.
Children are especially vulnerable to toxic effects.
Leaves are boiled and eaten as flavoring in some areas, particularly the southern United States. Used this way, pokeberry may be toxic. There may be safer, more-effective treatments. Take any medicinal drugs or herbs including aspirin, laxatives, cold and cough remedies, antacids, vitamins, minerals, amino acids, supplements, other prescription or non-prescription drugs. Dangers outweigh any possible benefits.