Can i take my 2mg of klonopin and my 50mg of hydroxyzine and my 750mg of robaxin (methocarbamol) at the same time?

Too much sedation: Too many similar meds with sedative properties taken at once. Why are you on all of these? There must be a better way.

Not advisable : They all have sedating effects which can be cumulative when taken together and thereby lead to accidental overdose. Wound not advise it unless there is a extenuating circumstance that you and your doctor are aware of.