What is meant by potassium hydrochloride in the context of a request from an ENT specialist to prepare a 100 mg potassium hydrochloride in 100 ml water solution for the treatment of a patulous Eustachian tube?

How can the strength of Emla be increased by adding 4% tetracaine, considering that only the HCl form is available which causes the base to liquefy, and can tetracaine be replaced by another substance or can tetracaine HCl be converted into the base form?

What are the shelf life and storage conditions for diazepam rectioles?

Can a suspension be prepared for a 2-year-old child from acetazolamide 125 mg capsules?

What is the best way to prepare an alcoholic lotion containing 12 g progesterone, 25 g propylene glycol, 1.5 g zinc sulfate, 12 g salicylic acid, 150 ml isopropyl alcohol, 150 ml denatured alcohol, and Aqua BP5 up to 450 ml, and should the formula be adjusted to prevent the precipitation that occurs during preparation?

Why is isopropanol used in the disinfecting gel, and is 70% ethanol not sufficient?

Why is isopropyl alcohol (isopropanol) added to ethanol for bactericidal and virucidal gels, considering that while 70% ethanol is optimal for intact skin and effective against various bacteria, fungi, and enveloped viruses (like HIV and HBV) due to their fatty envelopes, it is less effective against non-enveloped viruses, ineffective against spores, and loses bactericidal properties below 50%, leading to the recommendation of higher concentration mixtures such as 80% ethanol with 5% isopropanol for better inactivation of enveloped viruses?