Yes, you will notice a difference in the volume of your ejaculation - you are no longer ejaculating sperm.

How long has it been since your vasectomy? It can take many months to be fully healed from the procedure (there is usually some residual swelling and irritation).

I suggest you talk to your doctor or see a urologist before trying any potions or pills.

This is very common in men who have vasectomies and unfortunately there is nothing you can do about it. They dont tell you this when you go to have this procedure.

Actually they don't have to tell you because it is common sense. I mean, think about it, you are no longer producing or expelling sperm, so obviously this is going to decrease the volume of ejaculation. But, the amount of ejaculation doesn't affect anything at all. Your orgasms will get stronger after you heal and get used to it.

I know several guys who have had them and they said that sex has never been the same since they had it. So maybe this doesnt happen to everyone but it is a possibility. Good luck I hope for you and your partners sake that everything turns out ok.

I also know several guys who have had one and say sex is exactly the same, and some say it is even better.
So, I guess it just depends on how your specific procedure works out. Most guys won't get it done and say that it is going to affect there performance simply because they dont want to get it done when the truth is it usually (if done by a competent doctor) will not change anything except the fact that there isn't sperm in your cum.