What is the best procedure to prepare a syrup containing 140 mg pholcodine base, 15 ml water, 200 mg promethazine HCl, 4 g ethanol, 600 mg pseudoephedrine HCl, and 0.02% Respacal, adjusted to a total volume of 200 ml with grenadine flavoring as needed?

What is the appropriate preparation method for a stable cream containing 2 g urea, 0.3 g prednisolone, 1 g metronidazole, 1 g sodium lauryl sulfate, 10 g cetyl alcohol, 30 g liquid paraffin, 10 g yellow petrolatum, and water up to 100 g, given that the current formulation resulted in a clear separation of two phases despite attempts to adjust the emulsifier amount and the addition of Arlacel 83?

What is the best replacement and at what concentration for a 5% lidocaine and 5% prilocaine numbing cream for permanent makeup, given that Emla was not strong enough and prilocaine is currently unavailable at the wholesaler?

What is the most effective preparation method to prevent the breaking of a cream containing 5 g LCD, 3 g salicylic acid, 64 mg betamethasone dipropionate, 6 g Arlacel C83, 54 g vaseline, and aqua ad 100 g, given that previous attempts including rubbing with starch, evaporating the LCD alcohol, increasing Arlacel to 13 g, and adding Span have failed to ensure stability?

How do I prepare the following formulation: 1% hydrocortisone acetate in eye ointment up to 50 g, to be applied to the eyelids twice a day?

What is the formula for preparing decolorized iodine tincture to be applied to the nails for treating fungus?

What is the cause of the incompatibility in a preparation containing neomycin sulfate, Solu-Medrol, lidocaine HCl, Nystatin oral suspension, and water, given that a heavy yellow precipitate forms and the supernatant turns yellowish upon adding the Nystatin suspension, specifically when neomycin is included in a formulation that was previously stable without it?