Antibiotics have always affected me badly, so I’ve avoided them unless absolutely necessary, and take a probiotic to get past the inevitable stomach issues when I’m forced to use them.
A hot shower and gargling with warm salt water does me more good for a sinus infection than anything else. Don’t swallow the warm salt water if you try it though, it’s a good way to induce vomiting.
Squirt the saltwater up your nose with a plastic squeeze bottle. It works wonders for sinus problems. I have not had a cold, flu, or other illness since I started taking 2,000 IU of Vit D3 twice a day. Build up your immune system and prevent ilnnesses.