How can a stable preparation be achieved for a carbomer gel containing 4% tetracaine HCl, peanut oil, Span 80, and Tween 80, given that the gel completely liquefies when tetracaine is mixed with glycerin or propylene glycol and then added to the carbomer gel, or when tetracaine is mixed with the oils and surfactants before adding the carbomer gel?

Does anyone have a protocol, procedure, or information for the preparation of a bladder instillation with silver nitrate?

How can Chloropotassuril ampoules (1 g potassium chloride / 10 ml = 13.56 mEq K) be recreated in solution as requested by a cardiologist since they are no longer commercially available, and does the addition of citric acid as an excipient—alongside ethanol, sweeteners, and flavorings as mentioned by Delphi—have any influence on the available potassium?

Is there a solution for the instability occurring when 15% resorcinol is added to Lanette wax cream or cetomacrogol cream, considering a non-occlusive base is required for treating an abscess in a skin fold?

How can a cream containing 0.75 g ichthyol, 4 g liquor carbonis detergens, 1 g chlorhexidine acetate, 0.5 g menthol, 0.5 g calamine, 4 g crotamiton, 30 g lanolin, 30 g vaseline, and 30 g water be corrected if it fails to bind, remains slippery, and moves as a homogeneous mass within the jar?

Is there an explanation for the instability of a formulation containing 0.025% tretinoin and 10 grams of minoxidil in Fagron foam base up to 200 ml, given that the preparation only lasts for one month before the foam becomes liquid, and Fagron only provides information for preparations containing exclusively minoxidil?

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