What is the cause for an AVA cream containing 3% lactic acid and 10% urea sometimes turning out well, while recently it has been separating after a few days?

Where can the composition of "Phenytoin suspension FNA" be found, given that pediatric departments are requesting a Diphantoine suspension and this specific formula has been identified?

Which raw material can replace triethanolamine in the preparation of a gingivitis gel (NF VI) containing 1 g benzocaine, 1 g salicylamide, 250 mg vanillin, 20 ml ethanol 96% v/v, 500 mg carbomer 940, 10 g glycerol, 25 mg EDTA, 650 mg triethanolamine, and 20 ml aqua conservans, and what is the required amount of this replacement material?

What is a suitable alternative for Tegobetaine L7, which is no longer available on the market, for the preparation of Shampoo Simplex Herdewijn?

Is it possible to prepare an oral solution containing 45 g of ammonium nitrate and peppermint water up to 300 mL for the treatment of bladder problems?

What is the magistral prescription for propranolol 1% in hydrophilic ointment, given that infantile hemangiomas are common benign tumors in children that usually do not require treatment due to spontaneous resolution but occasionally do, and since the 2008 discovery that oral beta-blockers are effective but have serious side effects, recent literature reviews have shown that local beta-blockers—currently used as timolol eye drops or gel—are a safe and effective treatment for uncomplicated cases?

What is the correct preparation method for a nail solution containing 20% urea, 60% propylene glycol, and 10% lactic acid, given that using collodion as a viscous vehicle resulted in a non-homogeneous mixture that only partially dissolved upon heating and became cloudy again upon cooling?