My psychiatrist said it's possible to go up to 2x70mg a day if necessary. I thought the highest dose allowed is 70mg max per day?

I'm currently on 70mg but it only lasts until noon, I think. I can't really tell for sure. My psychiatrist mentioned that in some cases, it's possible to go above 70mg, by taking one dose in the morning and the next in the early afternoon. I think he only said it to reassure me that it's okay to need 70mg, but now I'm just wondering... Do you guys know anything about this? Any personal experiences, or maybe you know some studies? I just want to know a bit more about this.

Based in Germany, if that makes a difference.

Edit: I'm not considering going above 70mg, especially not without my psychiatrist's approval. I just got curious because I hadn't heard of it before.