Can the new carbomer gel from the TMF, which is now neutralized with trometamol, be used to prepare benzoyl peroxide gel, given that previous successful preparations required a NaOH-based gel because triethanolamine reacts with benzoyl peroxide to form an unstable quaternary hydroxylamine derivative, and considering that trometamol is a substituted methanamine rather than a trialkylamine derivative, or should a NaOH-based gel still be preferred?

What is the correct procedure for preparing a prescription consisting of 2 Nizoral tablets and 30 g of paraffin oil, to be administered as 3 drops in the ear once per week?

How can a 35-37% phosphoric acid gel be prepared for etching teeth?

What is the reason for the failure of a preparation containing 15 ml saponated coal tar, 15 g salicylic acid, 30 g cetomacrogol 1000, and shampoo simplex up to 300 cc, when using a prefabricated shampoo from Certa (CNK = 1560-838)?

How can I successfully prepare a cream containing 6 g liquid paraffin, 9 g lanette wax, 15 g white vaseline, 15 g distilled water, and 15 g rose water, given that the rose water keeps separating and increasing the amount of lanette N to 15 g, as described in the National Formulary VI, does not solve the problem?

What advice can be given for a preparation containing 2% erythromycin and 2% metronidazole in Bioderma Sensibio Forte (40ml)—which contains aqua, paraffinum liquidum, stearic acid, cera alba, propylene glycol, cetyl alcohol, glycyrrhetinic acid, glyceryl stearate, sorbitan sesquioleate, rhamnose, tocopheryl acetate, allantoin, sodium PCA, carbomer, TEA, and butyl-, propyl-, ethyl-, and methylparaben—given that the resulting cream does not appear very stable after mixing and using a tube mill?

How can a W/O cream containing 4.5 g disodium EDTA, 3 g salicylic acid, 100 g lanolin, and 100 g water be prevented from breaking when the powders are added?