Any MD or nurse will tell you to flush the tablets and liquid and to deliver the patches to a medical office that can put them in a "sharps" container. I am so sorry about your friend's loss. Did the father not have someone from a hospice to help out? The enviornmental concern as far as disposing of meds should not be a concern at all. Your friend will not get into trouble for having these meds in the house if there is nobody sampling the product.
Amy