Activated charcoal is a binder, so you need to take it 2 hours before any meds/supplements/herbs/food and 2 hours after any meds/supplements/herbs/food - or it will bind with them and not the toxins and usher it out of the body. Basically you need a 4 hour time period where you are not eating, drinking, taking anything that you don't want the charcoal to bind to. I find it's easiest for me to take it in the middle of the night when I get up to use the bathroom - it's like clockwork for me!!
You may only need to use one or the other of the pinella and burbur - I'm not sure what they specifically detox. You should still start only one at a time to see how well you tolerate and how well they work for you.