Pharmacology. Case Study

Pharmacology. Case Study

He returns a month later complaining of increased fatigue, visual disturbances, weakness, and nausea; however, his ECG is normal.
Based on this information, what is occurring in this patient? Include precise mechanism(s) of how it is occurring?
Additionally, please include any drug interactions associated with any new medications initiated keeping in mind the current regimen.
please see my orders 110860-61 for more info about this case