Hello. I was put on LDN several months ago. Started at 1 mg, which I didn't notice anything different after about a week. Bumped it up to 2 mg and my brain fog has vastly gone away (it improved gradually, other than when I'm tired, and then word finding and processing tasks is more difficult, and likely always will be. I didn't notice the change, but after about a month, I realized things were easier and obviously it was the LDN working! I was skeptical too since it's a strange "off label" use, but it has worked wonders for me! I say it has given me my life back. My energy level is probably better now on LDN than it has been in decades! I take it at night, as directed by my physician. (Apparently it can make you tired. It gives me a headache if I stay awake longer than 30 minutes after taking it.) I understand being hesitant to try another medication, but would highly encourage you to give it a shot. It really can't be any worse than the Long Covid symptoms, so you've nothing to lose and everything to gain. Go for it! Good luck in your recovery.