I weened off 50mg tramadol a day then half for 3days. i took tizanidine for 4 days felt fine .now takin clonazepam 0.5 how long does wtd last?

Depends: on how much you are taking for how long, as well as individual biology. If you are only taking 0.5 per day, withdrawal is likely to be minimal, and the long-acting nature of clonazepam actually causes a "self-taper" where the blood levels come down very slowly over a week or more, allowing your receptors to normalize themselves without withdrawal. If you get anxiety/insomnia, tremor, talk to MD,