Which antioxidant should be used for tretinoin cream and how should the cream be prepared, specifically for the formula: R/ Tretinoin, antioxidant q.s., anionic ointment base?

How can miconazole be dissolved in a preparation of 2% alum, 2g resorcinol, and 2g miconazole in 30% isopropanol up to 200ml, given that it is very poorly soluble in water and alcohol?

What is the best way to process lead oxide plaster in a preparation containing 1.5 g salicylic acid, 12.5 g sesame oil, 12.5 g lead plaster, and yellow petrolatum up to 50 g, given that flakes appear in the ointment after the lead plaster is melted, mixed, and cooled?

How can I prepare eye drops containing 25 mg Sodium Fluorescein, 40 mg Oxybuprocaine HCl, 167 mg Boric Acid, and Phenylmercuric Borate as needed in water up to 10 ml?

How can the prescription for Adalat 4 mg capsules (60 units) be prepared, given that Adalat 5 mg oil capsules and Adalat Oros cannot be processed, while Adalat Retard layered tablets could potentially be crushed?

What is a simple composition for a skin-bleaching ointment?

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