Is it possible to make vanilla syrup using vanilla aroma or vanillin, and if so, what is the formula for this, given that the NF V contains a formula for vanilla syrup with vanilla tincture but this tincture is no longer available?

How can a mouthwash composed of 4 grams of tetracycline HCl, 2 grams of lidocaine HCl, 1 gram of hydrocortison, and syrupus simplex BFV up to a total of 75 grams be prepared, and what are the instructions for the patient to hold the suspension in the mouth for 3 minutes twice daily before spitting it out?

What is the most appropriate way to resolve the solubility issues of hydrocortisone acetate in a dermatological prescription for external use containing 1% hydrocortisone acetate, 3% salicylic acid, 30% isopropyl alcohol, 40% propylene glycol, and water up to 100ml, and would it be better to use hydrocortisone base despite the risk of slightly reduced absorption?

What is the best way to prepare an anesthetic ointment containing 23% lidocaine, 3.5% tetracaine, and 3.5% tetracaine base in a vehicle of paraffin, PEG, and BHT as requested by a plastic surgeon, and are PEG ointments still commonly used?

What is the best way to prepare 100 grams of zinc peroxide 5% in carbopol gel (carbomer gel), considering that zinc peroxide is very difficult to incorporate into the gel?

What is the best practical way to control the mass variation of prepared capsules, how many capsules per batch should be checked by weighing, and is the rule generally applicable that for capsules under 300 mg, a maximum of 2 may have a 10% deviation and none more than 20%, while for capsules over 300 mg, a maximum of 2 may have a 7.5% deviation and none more than 15%?

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