Yes is it quite alright to take juice with P and B especially apple juice and wild berry juice. (unless you have candida)
Apple juice will also help cleanse your liver....
berry juice have plenty of antioxydants and help to deal with the toxins that do t\not get to be dragged down and travel freelyin your body.
Another way not to 'choke' is to wait 15 minutes before you drink it. The psyllium absorbes the water and it swallos easily.
Alway take plenty of water after the shake, at least as much as in the mix.