I’ve wondered this also. As an American who lived in Germany and found this while living there, I can attest that it’s quite effective for me. There are other quite useful and safe drugs that are not available in the US.
It's actually slightly more selective for a1 receptors than the German alternative. They both have the same dependence potential and rebound liability.
The US equivalent is oxymetazoline https://en.wikipedia.org/wiki/Oxymetazoline
It's actually slightly more selective for a1 receptors than the German alternative. They both have the same dependence potential and rebound liability.