A doctor wants to prescribe 15% resorcinol in cetomacrogol cream, but this cream separates completely; which anionic cream is best to use, or would a Beeler base be better?

How can this preparation be made using 6 g almond oil, 3 g cod liver oil, q.s. lavender oil, 18 g lanolin, and 17 g rose water, and is it necessary to add an emulsifier given that lanolin can still absorb 25% water?

What is the best way to prepare a prescription consisting of 20% saponinated coal tar and Elocom ointment up to 100%, considering that direct mixing is impossible and it may be necessary to absorb the coal tar into another substance?

What is a better solution to obtain a firmer cream for a preparation containing 1 ml chlorhexidine digluconate, 3 g salicylic acid, 5 g undecylenic acid, 6 g benzoic acid, 200 mg zinc undecylenate, and AVA cream up to 100 g, given that adding extra Arlacel in a previous attempt still resulted in a fairly fluid ointment?

What is the feasibility of developing a topical gel containing glucosamine sulfate and chondroitin sulfate as an alternative to oral administration, specifically regarding potential charge interactions with a Carbopol gel base, overall stability, and its potential as a new market opportunity?

Can testosterone propionate be used instead of testosterone in the same quantity for a prescription consisting of 2 g testosterone, 50 g lanolin, and 50 g vaseline, given that testosterone is unavailable as a bulk product, or will this lead to availability and absorption issues?

What is the cause of needle-like crystals forming in a cream containing 1 g metronidazole, 1.5 g lactic acid, and eucerin cum aqua (25%) up to 100 g, which appear a few days after preparation even though the ointment was processed through an ointment mill three times?