Just as a reminder, you are completely allowed to buy pseudoephedrine without a prescription, you just have to ask your pharmacist. My local pharmacy keeps it behind the counter already pre-compounded, and it's cheap and effective. One of those little things that I never used to purchase because I was somehow not certain if I could actually get it. Yes, you can.
There's a limit to how much you can buy per day, per 30 days, and per year.
My local pharmacies keep it behind the counter, but the counter has shorter hours than the rest of the store. And you've got to submit your license to be entered into their system (and who knows what happens with that data).
In Belgium it's no longer available without prescription since this month. Reasoning is that it can trigger cardiac issues, neurological issues, and even psychiatric issues in some people.
You need a drivers license though. And they enter something into the computer.
What country are you in? In the US, pseudoephedrine has to be requested at the pharmacy counter, but it's not a compounded medication. Instead it's sold as pills in the usual "blister pack" format.