In general, the fda will require prescription use only when a drug is answer : toxic, requires a physician s supervision for safe use, or is addictive. only if the drug is toxic. only if the drug is either toxic or requires a physician s supervision for safe use. only if the drug is addictive or requires a physician s supervision for safe use.

answer; (payor

during longer space exploration trips, crewmembers may develop vision impairment risks and short-term cardiac atrophy or a decrease in the size, strength, weight, and activity of the heart during space flight because they can experience microgravity. in addition, the long-term medical condition is loss of bone mineral density and radiation exposure.