How do we prepare a 2.5 mg Midazolam (Dormicum) rectal solution prescribed for a 4-year-old child?

What can be used as a replacement for 40 g of Tragacanth, and in what quantity, in an EEG gel formula consisting of 600 g coarse sea salt, 720 g pumice powder, 22.4 g potassium bitartrate, 140 g glycerol, and 1400 g water, ensuring the gel adheres well to the head during the scan but remains easily removable from the hair afterward?

It is claimed that methadone HCl is less stable in solution when raspberry syrup is present; what reaction causes this, and is there a difference between artificial and natural raspberry syrup?

What causes the dark discoloration of an O/W cream containing 0.6 g metronidazole, 0.9 g salicylic acid, 0.9 g resorcinol, 0.9 g precipitated sulfur, 1.5 g cetostearyl alcohol emulsifying type B, 1.5 g sesame oil, and aqua conservans TMF up to 30 g?

Can a formula consisting of 15% aluminum chloride hexahydrate, 2% methylcellulose, and water up to 100 ml be safely prepared and applied to the skin using only water as a solvent, considering that while the TMF formula typically uses isopropanol, the Merck Index states that anhydrous aluminum chloride reacts explosively with water?

How do I calculate the correct chlorine content and what is the best preparation method (normally we use heating) for a formulation consisting of 50 g sodium hypochlorite solution (0.5% active chlorine), 0.5 g white beeswax, and 49.5 g paraffin, to be dispensed in a total quantity of 250 ml?

What is the best way to prepare phenylephrine oral drops 10 mg/ml, given a prescription for phenylephrine 10 mg/ml with instructions to take 10 drops for low blood pressure?