Drugs lose effictiveness in Space

The typo makes me hear the headline with a New Zealand accent.

>"Repackaging of medicines into containers that do not give the medicines the protection required to moisture, oxygen and light can have a detrimental effect on their stability."

I'm not sure what that quote is implying. Were the ones on the space station packaged differently than the ones on Earth? Wouldn't that add a bunch more variables to the experiment?

http://en.wikipedia.org/wiki/Sex_in_space "Numerous physiological changes have been noted during spaceflight, many of which may affect sex and procreation, although it remains unclear whether such effects are due to gravity changes, radiation, noise, vibration, isolation, disrupted circadian rhythms, stress, or a combination of these factors.[5]"

I wonder. What about microgravity?

Could the lessening of gravity's influence distort the structure of both the drug compounds and the chemical receptors in the body in unpredictable ways, so that they no longer chemically interact with one another?

Wonder if diseases are also affected.