Personally, I find these distinctions a bit silly but I also understand they have some use.
People sometimes divide neuroscience into molecular, cellular, and systems levels of understanding. Molecular covers all the "one cell" phenomenon: expression of particular receptors or related proteins, for example. Cellular is one step above of molecular and ...
This review article  gives dopamine responses for rats (similar to the BBC article above) and includes references to the underlying studies:
Sex/Food: 150% - 300%
Alcohol/Ethanol: 190% (1g/kg) *
Morphine: 200% (1mg/kg) *
Nicotine: 220% (0.6mg/kg) *
Cocaine: 350% (5mg/kg)
Methamphetamine: 1000% (1mg/kg)
These are percentages of the baseline ...
Prophylaxis is typically prior to exposure. Condoms, for example, were historically referred to as prophylactics, in that they prevent pregnancy and many STIs. The reason the pre-exposure bit is given special attention in this context is that it refers to use of drugs with substantial risk of harm. Because of their associated risk, these drugs were ...