I started LDN after visiting the Mayo Clinic this past April. Suffered my fourth Covid infection last summer (July, 2024) and did not bounce back. Had severe SOB and several episodes of ventricular tachycardia, extreme fatigue, and insomnia, as well as brain fog. Ablation procedure last August stopped the VT, but all the other symptoms continued. Was absolute hell. Could not work. I was lucky to be seen at Mayo Clinic where they ran me through several tests to confirm Long Covid Syndrome. Suggested a handful of meds to try, one being LDN. Started at 1.5mg and am now at 3mg with a target of 4.5mg. I echo what many others have said in that it has improved my sleep and maybe a little improvement with strength/stamina ( I still experience PEM however). SOB and brain fog have not changed due to LDN. Trying to stay positive and patient in giving LDN time to work.