Blocking Prescription Based Products Without Using Shopper Groups

[Soco]

Hi there

Thank you all in advance for your assistance.

We have an online shop selling veterinary care products, certain products require a prescription before we are able to sell them. Until now we have been using shopper groups for this, however I would prefer if we could use a different method. A method that would allow all visitors to see the products as a default shopper or just a visitor, but would require either a password or something else along those lines before they would be allowed to add the products to their cart. Is this possible?

We are on VM V 3.2.2 at the moment.

Again thank you for all the help.