Is there a good formula and preparation method available for a diazepam syrup?

We prepare an after-sun milk that is appreciated by our clientele, but while starting a new batch for the summer holidays, we have noticed the formation of a sediment that is difficult to shake up; should the following composition be modified?

What factors influence the stability of W/O creams?

Why does a cream containing 4% erythromycine and 4% hydroquinone in an anionic hydrophilic base turn pinkish-red, and is this combination also unstable and prone to discoloration when prepared in a Beeler base?

What is the formulation for the preparation of a 1% 5-fluorouracil eye drop (fluoracedyl)?

How can I resolve the issue where clobetasol propionate floats on top and does not remain in solution when preparing a mixture of 250mg clobetasol propionate, 400mg lidocaine HCl, 10ml propylene glycol, and water up to 250ml?

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