Do stability studies exist for oral chloral hydrate solutions?

What is the purpose of belladonna and guaiacol in Dalet balsam, and can these ingredients be omitted when treating hallux valgus?

What are the potential causes and solutions for the instability and water separation observed when mixing a 2% hydrophilic tretinoine concentrate—composed of 250 mg tretinoine in a basis of 30 g cetostearyl alcohol, 40 mg butylhydroxytoluene, and propylene glycol up to 100 g, prepared via a mortar and ointment mill and stored for up to six months—into an extemporaneously prepared cremor non-ionicus oleosus containing 6 g cera alba, 5 g cetaceum, 31 g cetiol V, 2 g Span 80, 8 g Arlacel C, and 48 g aqua conservans, to achieve a final concentration of 0.05% tretinoine?

How can liquor carbonis detergens (LCD) be added to a fatty cream containing 65 mg betamethasone dipropionate, 5 g LCD, 5 g salicylic acid powder, 6 g Arlacel 83, and 54 g white petrolatum with water up to 100 g, without causing the cream to break?

What is the best gel to use for a preparation with histamine as the active ingredient, as requested by a physiotherapist, and would a non-ionic gel be suitable?

Since Furandantine MC capsules are frequently unavailable lately, can you recommend a formulation to prepare this specialty as a compounded medication, and is there a bulk product on the market suitable for use as a substitute for the MC form?

How should I prepare the following ear drops for the inner ear: 100 mg prednisolone, 10 mg triamcinolone, 1 g urea, and physiological solution up to 15 ml; specifically, can prednisolone be replaced by prednisolone sodium phosphate and dissolved in water along with the urea, and should the triamcinolone be dissolved in ethanol and then added?