What is the best way to prepare a mixture of 10 g LCD, 3 g urea, and cold cream up to 100 g, given that dissolving the urea in an equal amount of water and mixing it with the LCD and Alpha Pharma cold cream in a mortar results in suboptimal stability?

Could you provide more information regarding the ratios, an available formula with known stability, and solubility data for a magistral preparation of Serlain (sertraline hydrochloride) concentrated solution containing glycerol, ethanol, BHT, and levomenthol, given that the patient needs to take 20 mg of sertraline per day in, for example, 10 ml?

How can a stable cream containing 5g saponine coaltar, 8g salicylic acid, 8g urea, 300mg zinc sulfate, 5g chlorobutol, 320mg methylprednisolone, 160mg dexamethasone, 120mg betamethasone dipropionate, 17g cetyl alcohol, 21g white vaseline, 15g glycerol, 3.6g cetomacrogol 1000, and water up to 100g be prepared, given that the mixture breaks and develops a purple discoloration specifically when the saponine coaltar is added to the otherwise successful ointment base?

How do I prepare acidic ear drops with hydrocortisone 1% and neomycin 0.5% for otitis externa?

How do I prepare the following cream: Carbomer 940 0.5g, vaseline 9g, water 8g, propylene glycol 2g, Lanette N 3g, liquid paraffin 2.5g, capsicum oleoresin 3.3g, and DMSO 75g (total = 103.3g)?

We are looking for a formula for a 0.5% tretinoin solution to treat black hairy tongue or lingua villosa; is the prescribed concentration not too high, and which solvent is suitable?

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