The powers are not confined to one sex. It is accepted that in legislation "him" also means "her". We are talking about medical practitioners of either sex or nurses of either sex.
We have restricted the power to class A drugs on the basis that an exceptional power of this type should be limited to the most serious crimes. No one will doubt that drug smuggling is a very serious offence. The smuggling of lesser drugs, such as cannabis, remains a very serious offence, but it does not follow that the same threat is involved. Trafficking in heroin and other hard drugs is unique, and we believe that such powers are appropriate.