What are the incompatibilities when mixing solutions for aerosol therapy?

An ENT specialist prescribes the following: 50 mg chloramphenicol, 3 vials of 750 mg Urfamycine, 3 ampoules of 600 mg Mistabron, 1 bottle of Celestone, and physiological serum up to 100 ml, to be administered as 8 ml per nostril via Rinoflow; given that a precipitate forms, is this due to the low solubility of chloramphenicol in water and how can it be resolved?

How can I prevent the crystallization of prednisolone in a refrigerated compounded formula containing 200mg prednisolone, 400mg lidocaine HCl, 1 vial of nystatine Labaz, 3g hydroxyethylcellulose, 10ml propylene glycol, and aqua conservans ad 500ml, given that increasing propylene glycol to 30ml and attempting to dissolve the prednisolone in 10ml of 96% ethanol before dilution still resulted in precipitation?

Can you provide a composition for the preparation of a lotion with 2% ketoconazole for the scalp, which is reportedly available on the internet?

What is the best procedure to follow for a preparation containing 120 mg triamcinolone acetonide, 840 mg neomycin sulfate, 10 ml propylene glycol, and ethanol 60° ad 120 ml, given that triamcinolone dissolves in ethanol and neomycin in propylene glycol/water, but mixing these two clear solutions results in a white milky liquid?

How can I prepare the following formula—30 g glycerin, 10 g borax, 55 g rose water, and 5 g benzoin tincture—without precipitation, given that a precipitate forms at the top when the benzoin tincture is added?

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