benzos can mess with mine a bit if im using high doses, but i mean high doses when im using them recreationally (dont usually find them recreational by themselves though), therapeutically never noticed a difference.
if im using em with alcohol it can make it a bit harder, but ive never had my libido super killed and (alcohol would be much more the culprit, but i wouldnt drink much just a beer or two), maybe harder to get hard but not completely impossible.