Counterfeit drugs is a big problem worldwide and it was in the past a certain terrorist organisation was involved in counterfeit drugs and other crucial things like aircraft parts in order to make the funds for it's activities.
But as to malaria medication, it was suggested there is something in Neem oil, of which in India, just about every village has got a Neem tree, but suggestion of the use of Neem is going down the route of alternative medicine which big pharma is against and tries through it's lobbying of governments to remove from the public sphere. But as long as what big pharma sells is expensive, the more likelihood that counterfeit drugs will be available, be that cheaply or at full price as the end user not knowing if they have fake or genuine due to the cost being the signifying factor i.e. expense means it's the real thing and not fake.
Perhaps the only way to kill the industry in fake and therefore useless medications is for rapid testing tools to be created and there made available to everyone so they may at point of sale randomly test the product prior to purchasing or indeed imbibing, either that or nationalise the pharmaceutical industries and there push the price of medications down so low there is no profit to be made in fake medications.
But big pharma lobbying had even hit the UK what with very effective alternative medicines being banned in the UK based upon minority occurrences of abuse, two I used to use were Melatonin and Kava Kava, two substances that did the job without creating dependency or disagreeable side effects, and no real sense why they got banned, but there are pharmaceuticals that do what they do, the trouble is, they create dependency which is of interest to industry despite what they say to be pc.