Which anesthetic gel can be magistrally prepared for a local dermatologist that does not have a vasoconstrictive effect and can be used to numb the skin during the laser removal of couperose?

What is the best way to prepare a lotion containing 4 g erythromycin, 1 g zinc acetate, 2 drops of acetic acid, 65 g disinfectant alcohol, 10 g propylene glycol, and water up to 100 g?

How can precipitation be avoided in the following solution: 6 g salicylic acid, 8 g boric acid, 120 ml isopropanol, and water up to 200 ml?

How should I prepare a solution containing 12 g of quinine hydrochloride, 30 mg of sodium metabisulfite, and water up to 60 ml, to be delivered in a bottle with a dropper where 20 drops equal 1 milliliter, given that the quinine crystallizes after being dissolved in heated water?

How should I prepare a cream containing 15 g liquor carbonis detergens, 15 g chlorobutol hydrate, 15 g salicylic acid, 800 mg zinc sulfate, 480 mg methylprednisolone, 480 mg dexamethasone, 120 mg betamethasone dipropionate, 51 g cetyl alcohol, 63 g white petrolatum, 40 g glycerol, and 21 g polysorbate 80, with water up to 300 g, given that the base alone is stable but the mixture separates after ten minutes despite appearing homogeneous initially, even when the chlorobutol is dissolved in liquid petrolatum?

What does the abbreviation MPG stand for in an oily preparation consisting of 50% Propolis mother tincture and 50% MPG, where can this product be ordered, and what is a suitable lipophilic excipient for this mixture given that Carbopol gel is unsuitable for treating wounds on fish and trials with silicones and Cetiols were unsuccessful?

What solution can be proposed for the preparation of 10 suppositories, each containing 250 mg of tannin and 250 mg of benzocaine, given that the resulting mass is currently not pourable?