Final answer:
If a compounding prescription does not specify a type of alcohol, the most commonly used options are ethyl alcohol (found in beverages) and isopropyl alcohol (used in rubbing alcohol).
Step-by-step explanation:
If a compounding prescription calls for alcohol without specifying a type, the most commonly used alcohol is either ethyl alcohol (found in beverages) or isopropyl alcohol (used in rubbing alcohol). Ethyl alcohol, also known as ethanol, is commonly used as a solvent and is found in alcoholic beverages. Isopropyl alcohol, on the other hand, is used as a topical antiseptic and disinfectant. While it is important to consult the specific compounding guidelines and regulations, these two alcohols are typically used in compounding when alcohol is required.