Cascara Sagrada and Pysillium questions

I have recently bought some cascara sagrada 100mg capsules (on the label says standardised 25-30%) and it says to take one a day - is this enough or should I increase the dosage?

I am also taking RenewLife CleanseMore capsules - 2 a day(containing aloe, rhubarb root, slippery elm, marshmallow root, and Triphala), as well as a physillium hhusk product. I have heard that you shouldn't take physillium for too long, but am just wondering how long is too long? Is it safe to take for a month non stop?

Any advice would be very gratefully received!

Best wishes