Aspirin is evidently extremely expensive in Germany & when I visited, my friend asked me to bring some. I bought 3 Bayer 500-count bottles for $14 each at CostCo & there was no problem whatsoever.

Don't know if that's under the same customs category as vitamins, though. I brought vitamins back from Germany: the fizzly ones that you drop in a glass of water like alka seltzer. They're amazing! I love drinking them!