Does a specialty mouthwash containing hydrogen peroxide exist?

What is the ideal preparation method for a solution containing 4 g minoxidil, 60 mg betamethasone valerate, 20 g propylene glycol, 30 g alcohol 60°, and water up to 200 ml, and how much alcohol or propylene glycol should be used to prevent the minoxidil from recrystallizing after initial heating and dissolution?

What is the correct preparation method for a testosterone gel originally formulated with oleic acid (10 ml), HPC (3 g), water (30 g), and ethanol 96% (ad 100 g), given that oleic acid is unavailable and an alternative formula using 1 g testosterone, 500 mg Carbopol 940, 65 ml alcohol 96%, 10 g isopropyl myristate (IPM), triethanolamine, and water (ad 100 ml) resulted in ethanol separating and floating on top of the gel after standing overnight, even when IPM was used to replace oleic acid in the original HPC formula?

What is the ideal preparation method for Unguentum Haemo-Nasale MFS—composed of 600 mg Hamamelis liquid extract, 3 g phenazone, 3 g tannin, 6 g water, and Unguentum Simplex up to 30 g—to prevent the formation of a hard mass that cannot be rubbed?

How can a magistral levetiracetam syrup with a higher concentration be prepared starting from tablets since the raw material is unavailable, considering that while solubility appears to allow for a stronger concentration, there are concerns regarding taste and stability?

What is the maximum allowable concentration of aluminum hydrochloride in a deodorant?

How can an oral solution of beclomethasone dipropionate be prepared at a concentration of 1 g per liter in an oily solution, as requested by the physician?