neilmac Mar 3, 2020:

@Douglas FYI, restricting your answer to paying members does not necessarily guarantee quality of responses. For example, I stopped paying the tithe a few years ago, but I'm still an active contributor to the kudoz section. However, in this query, I wasn't even able to agree with Robert's suggestion or crack a joke. I'm suppose I'm lucky I can still post a comment here in Discussion.

Robert Carter Mar 2, 2020:

@Douglas Actually, I'm not entirely sure "free sale" has the same meaning as "non-prescription" in this context. I've had a look into this a little more, and I haven't been able to either confirm or refute that idea. Years ago (15 or more) I used to translate certificates of free sale in Mexico for the US, and thinking back, I'm fairly sure I did some that included oxycontin, which is definitely not an OTC medication.
In any case, I've no idea what "Ap" means here, so I'm afraid I can't help either way. Good luck!

Douglas Davies (asker) Mar 2, 2020:

Thanks for your replies. I've just realised that the table entries are misaligned with the headers. "VL" appears under "Ap".
"Venta libre" seems like a good option, although a prescription was issued for this item and the same applies to another 4 items with "VL" on another pharmacy receipt (Primperan, Bisolvom, Tavanic, Zamene).