Pacemaker - long term effects - ED due to pacemaker and or heart pills

The Hodgkins was cured a while ago, but the long term effects left my heart in trouble - it actually stopped. A pacemaker was added to bring back my electric pulses - all ok - but also came a few daily heart pills: Beta Blockers, etc - these were not actually directed to the electric problem. Now there is ED. Life with ED is a drag. Also the pacemaker tends to slow me down. The anti-ED pills don't work well. My feeling is that the cardiologist is stocking me up with pills recommended by the pharm sellers, not caring about my quality of life.
Any ideas?