Problem: The nurse is preparing to administer an Antiparkinson drug. What are the advantages of taking a combination of carbiodopa and levodopa? Select all that apply. Monitor renal function. Interactions between levodopa and other drugs can increase beneficial effects of levodopa, decrease beneficial effects of levodopa, and increase toxicity from levodopa. By causing direct inhibition of decarboxylase, carbidopa eliminates concerns about decreasing the effects of levodopa by taking a vitamin preparation that contains pyridoxine. Carbidopa/levodopa has no adverse effects