What is the most suitable base for prescribing "pix" (coal tar) for persistent atopic eczema, and do you believe that propylene glycol adds value to preparations such as 3% pix and 0.1% triamcinolone acetonide (TCA) in paneucerine cum aqua for hospitalized patients, or 3% pix, 0.1% TCA, and 10% zinc oxide in cetyl cream for weeping lesions?

What is the remedy for the following ointment containing 10g ichthammol, 10g DMSO, 2.5g menthol, and ad 50g unguentum simplex, which currently breaks during preparation?

How can a potassium phosphate solution containing 3 mmol phosphate/ml and 4.4 mEq potassium/ml be prepared in response to a veterinarian's request?

How can the crystallization of salicylic acid be prevented in a 300 ml solution containing 5% salicylic acid, 10% propylene glycol, and equal parts water and alcohol, specifically when 94° alcohol has been replaced by 85% V/V disinfectant alcohol, resulting in an initially clear solution that later precipitates, and would using denatured alcohol be a better alternative to address the low alcohol content?

What could be the reason why doctors frequently prescribe pregabaline and gabapentine in non-buffered cetomacrogol cream instead of the buffered version, despite the Receptuur-Helpdesk recommending buffered cetomacrogol cream to ensure the stability of gabapentine?

What concentration of methylene blue should be used as a topical treatment in the human mouth and for the treatment of white spot disease in fish?

What are the stability problems of a solution containing 3 grams of Phenobarbital sodium and purified water up to 300 cc?