I know that very few meds work for me. I did find out that gabapentin actually helps me. I tried to stop taking it to see if it actually helped….yeah, won’t do that again. I don’t get any side effects that are weird, just the ability to walk.

I have weakness and spasm and gets so bad I have muscle cramps, bad at night especially

Yes I have spasms in my legs off and on all day. Take muscle relaxers and lyrica.

It causes weakness in your legs, YES. This is why morning stretches and exercise is so important! The muscles in the legs get tight due to the inflammation. Riding a bike is good for this but you also need to do the morning stretches! Please go to the Spondylitis Association of America and do the Back in Action Again stretches. There are videos to help you. Also do some form of exercise during the day to strengthen your muscles and the stretches at night. If you don't it'll only get worse!

Yes, also restless leg syndrome. Legs always feel weak. I often use a cane, I have a wheelchair in case it's needed as well. I also wear knee braces as both knees are shot