Hi.. My husband was diagnosed with Parkinson s disease and he is taking a lot of meds including carbidopa/levo, nifedical XL, Pravastatin, Lisinopril, Lovaza, and imdur. He was recently put on the nifedical XL and imdur because he was having some stinging in his chest during exertion. He had a heart cath and they did not find anything. Said he was clear, maybe some small arteries. He has lost the ability to fully get an erection would one of these meds cause this or a combination of meds. He is very frustrated could you please shed some light for him.