I usually take 1mg of klonopin (clonazepam) once a day. i went off of it for a month. today, a month later, i just took 1mg. should i be okay? did my tolerance go down in a month? should i have split the pill?

You will be okay: You will be okay, but maybe more sedated or sleepy than usual. It is better when you start back on a sedating drug like that to start with a lower dose.

Start with a split: It is usually best to take the lowest dosage that will be helpful. It is possible that your tolerance went down. In this situation I would probably suggest start with a half a pill and go back to your usual dosage if needed. Also consider discussing with your doctor whether therapy should be considered