Why does aminophylline turn green in codeineform syrup but not in codeine syrup, and does this instability mean that the active effect disappears?

How can the liquid consistency of a cream be corrected when following a prescription for 2 g of salicylic acid and 20 g of Efudix ointment (containing 5 g fluorouracil, propylene glycol, polysorbate monostearate, stearyl alcohol, petrolatum, methylparaben-propylparaben, and water up to 100 g)?

Regarding diachylon ointment as a treatment for skin fissures, is its strong reputation justified or overestimated, and since lead plaster (emplastrum oxidi plumbici) is no longer available due to heavy metal content, are there scientific arguments for the effectiveness of diachylon, a worthy alternative to suggest, or was the efficacy of lead plaster ointment actually derived from its other components?

Is it possible for interactions to occur between betamethasone dipropionate and trometamol when preparing a generic version of Diprolene gel, which contains 0.64 mg betamethasone dipropionate, titanium dioxide, carboxypolymethylene, sodium hydroxide, propylene glycol, and purified water up to 1 g, if titanium dioxide is replaced by 10% zinc oxide and the TMF carbomer gel—using trometamol as a neutralizer instead of sodium hydroxide—is used as the base?

What is the composition of bromide syrup, or where can the composition be found?

How can a formulation containing 10.2g methyl salicylate, 5.44g menthol, 1.36g eugenol, and carbopol gel up to 100g be prepared, and is it possible to obtain a homogeneous gel with this amount of methyl salicylate, considering that the previous attempt to use 10g of alcohol failed to produce a stable result?

What is the proper method for preparing a prescription containing 30 mg/5 ml cysteine, 30 mg/5 ml methionine, and 2 mg/5 ml biotin in simple syrup up to 300 cc, given that these substances are insoluble in both water and alcohol?