How can I process 10% salicylic acid into Fagron oleum capitis to create a stable preparation?

What is the cause of the instability and water separation in a rectal ointment containing 1.5 mg prednisolone, 0.1% chlorhexidine diacetate (replacing hexachlorophene), 5 mg lidocaine, 10 mg promethazine, and eucerin cum aqua up to 1 g?

Can Lonsurf be processed into Orabase?

What is a good formula for an EEG gel, given that tragacanth is no longer available and the current formulation consisting of 50 g NaCMC 1000 mPa.s, 500 g boric acid solution, 220 g glycerin, 200 g NaCl, 2.45 ml HCl, and water up to 2000 g provides the desired results but becomes as liquid as water after two months?

How do I prepare a 5 mg/ml prednisolone mixture?

Which ointment base should be used for this ointment with such high concentrations of revulsives, containing 10 g menthol, 4 g camphor, and 30 g methyl salicylate with ointment base up to 100 g?

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