What is the best way to prepare an anesthetic ointment containing 23% lidocaine, 3.5% tetracaine, and 3.5% tetracaine base in a vehicle of paraffin, PEG, and BHT as requested by a plastic surgeon, and are PEG ointments still commonly used?

What is the best way to prepare 100 grams of zinc peroxide 5% in carbopol gel (carbomer gel), considering that zinc peroxide is very difficult to incorporate into the gel?

What is the best practical way to control the mass variation of prepared capsules, how many capsules per batch should be checked by weighing, and is the rule generally applicable that for capsules under 300 mg, a maximum of 2 may have a 10% deviation and none more than 20%, while for capsules over 300 mg, a maximum of 2 may have a 7.5% deviation and none more than 15%?

Is there a solid proposal for processing erythromycin into an emulsion, considering that the product's low solubility can cause problems during processing?

How can a preparation containing 4 g of salicylic acid, 3 g of resorcinol, and 1 drop of castor oil, which is to be incorporated warm into 10 g of white vaseline, be formulated to ensure it is free of resorcinol clumps?

Is there a special ingredient present in Loceryl nail polish to promote penetration, and how can the penetration of betamethasone valerate into the nail be optimized?

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