The best way to reduce the risk of negative reactions when taking cannabis for epilepsy is to follow the instructions and guidance provided by a medical professional. It is important to start with small doses, increase slowly over time, and monitor any changes in symptoms or side effects closely. It is essential to purchase cannabis products from reliable sources that have been tested for purity and potency. Doing so can help ensure that the product contains safe levels of cannabinoids without other harmful substances like mold, heavy metals, pesticides, or solvents. If possible, patients should seek out strains with higher concentrations of CBD as this compound has been shown to be effective at reducing seizures while minimizing psychoactive effects.