What is the best way to prepare 10 ml of eye drops containing 0.5 mg/ml of Vitamin B12?

What advice can be given regarding a preparation containing Nizoral shampoo, 0.5% salicylic acid, and 10% LCD?

A prescription specifies the following preparation: R/ codeine 10mg, prednisone 3mg pro gel 1 dt 20. Can codeine phosphate be used instead of codeine and, if so, in what quantity?

Is a formula available for a benzalkonium chloride solution to magistrally prepare a large volume for a patient, as the Cedium benzalkonium chloride solution is not available in that size?

How should I prepare these eye drops containing iodides (100 mg each of sodium iodide and potassium iodide for a 10 ml collyrium), and can I prepare them using only sterile water or is it necessary to adjust the pH and make the eye drops isotonic?

How should the prescribed ear drops containing 5 ml Maxidex eye drops and 1% salicylic acid be prepared, and what solvent can be used to dissolve the ingredients given that there is no RIZIV reimbursement if Maxidex is used?

What is a "SMOG" enema?