I have been taking Nal since Feb 2011 and have successfully reduced my drinking (though not as much as I'd like), but I haven't noticed any negative impact on sex life. Orgasms vary, but don't they always? Having said that, I never have sex right after drinking - since that is usually problematical anyhow (drinking isn't exactly the best thing to get your body parts working properly, if you know what I mean

). So sexual activity has taken place the day after Nal+alcohol and before drinking that day.