Yes, my general formula is 2 parts Bacopa, 2 parts Motherwort, 1 part Blue Vervain, 1 part Chinese Polygala, 2-4 drops Pulsatilla (per dose). As for herb drug onteractions, it depends on what the person is taking, as to whether there could be an issue or not. The formula is often altered depending on the specifics on the person and their case.