What would be a suitable alternative for the Fagron throat spray aroma (CNK 2565067) in a compounded throat spray containing 0.2% chlorhexidine digluconate and 0.05% lidocaine HCl, now that the Fagron solution is no longer available?

Regarding the preparation of aqua conservans NF 5 using a solution of propylene glycol, methyl parahydroxybenzoate, and propyl parahydroxybenzoate, what is the shelf life of this solution, is it still necessary to boil the water when adding 1g of this solution per 100 ml, and can this method be used for internal preparations? Additionally, are there more recent guidelines than the 2010 article in the Pharmaceutical Journal for Belgium regarding the shelf life of magistral and officinal preparations, and should a 1% to 3% acetic acid solution in water also be evaluated according to that 2010 table?

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Regarding the problem of storage for self-made cetomacrogol cream, why is the freshly prepared version without preservatives only stable for 1 week, even though non-preserved, water-containing creams or ointments are thought to be stable for 3 months?

What is the recommended dosage for vanillin as a substitute for banana flavoring in a pill-swallowing gel consisting of 10 g xanthan gum, 1 g sodium saccharinate, and aqua conservans up to 1 L, and can caramel be used as an alternative flavoring agent?

Are preparation sheets available for Liquifine®?

What is a suitable formulation for an anal rinse containing metronidazole?