Viva-D soft Alfacalcidol Phenytoin
ModeratePhenytoin, a medicine used for fits (seizures), can make your body need more vitamin D than usual. Alfacalcidol is a form of vitamin D, so if you take both, your doctor may need to adjust your Alfacalcidol dose. Do not change the dose yourself. Tell your doctor that you are taking both medicines.
These medicines are often taken together with some care. Your doctor may change a dose, space them apart or check on you more often. Make sure your doctor and pharmacist know you take both.