Using levodopa inhalation with other drugs that make you drowsy can worsen this effect. Ask your doctor before using opioid medication, a sleeping pill, a muscle relaxer, or medicine for anxiety or seizures.
Tell your doctor about all your other medicines, especially:
isoniazid;
metoclopramide;
risperidone or other antipsychotic medication;
iron medication, such as ferrous fumarate, ferrous gluconate, or ferrous sulfate;
a multivitamin or mineral supplement that contains iron; or
other medicines to treat Parkinson's disease.
This list is not complete. Other drugs may affect levodopa inhalation, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible drug interactions are listed here.
 Levodopa drug interactions (more detail)
