Regarding the preparation of a 50 mg/ml pregabalin solution for a cat, is a standard solution stable, or are additions such as stabilizers or pH adjustments required?

Given that 0.5% atropine sulfate eye drops are prepared by diluting 1 mg/ml atropine sulfate ampoules with 0.9% NaCl and filtering through a 0.2 mcg sterile filter into a sterile bottle, is a shelf life longer than 14 days justifiable despite the helpdesk recommendation, what are the consequences or loss of activity if used longer, and are there alternative suggestions to reduce the frequency of pharmacy visits for the patient's parents?

We have a preparation for melatonin 20 mg pgu, dispense 60 capsules; is this a common dose?

What is a suggested formula for Malarone syrup for children, and in which vehicle should it be suspended?

What is the cause of precipitation when adding peppermint spirit to a concentrated fluoride mouthwash containing 2500 mg sodium fluoride, 4000 mg methylparaben, 250 mg sodium saccharin, and 50 ml peppermint spirit in water up to 500 ml, and would using peppermint oil instead of the spirit resolve this issue or result in the same problem?

Can Lidocaine HCl be combined with Maalox (aluminum oxide and magnesium hydroxide), does this result in the formation of a precipitate, and does the mixture retain its effectiveness?

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