[The Conversation Africa] When last did a headache have you reaching into your medicine cabinet - and finding a bottle of aspirin that expired three years ago? Did you take it anyway? And, if you decided instead to get rid of those out-of-date painkillers, how did you do it? If you chose to throw it in the garbage or flush it down the toilet, you're far from alone: a 2020 research review found that "disposal of pharmaceuticals by garbage and sewer is still the most common method in many countries with the absence of the proper