I'm not sure I entirely follow Alt+F4's argument, but s/he seems to be claiming that Megrahi's health benefits were gained not from the branded drug but from some cheap knock-off. This is quite a claim, but wasn't even accompanied by any evidence that cheap knock-off versions of the drug are actually being made.
In my opinion it's highly unlikely the Gadaffi regime would have gone for a cheap knock-off of dubious provenance, rather than simply purchasing the drug in the normal way. No evidence has been presented to demonstrate that an order from properly accredited oncology specialists in Libya should have been rejected as illegal by the suppliers.
Megrahi was highly regarded in Libya because of what he did in 1999. Although he had not been convicted of anything, and no evidence had been presented to demonstrate his culpability, in 1992 the UN simply accepted the word of the US DoJ that they had "overwhelming evidence" that he was the Lockerbie bomber. Gadaffi refused to extradite him, without any supporting evidence being produced. The UN then imposed punitive sanctions on the whole country. Horror stories abound of that time, such as heart attack patients dying in ambulances on their way to Tunisia, because drugs and medical supplies to treat them were unavailable, and they couldn't even be flown out. Some have said the sanctions caused thousands of deaths among innocent Libyan civilians.
That was the background against which Megrahi voluntarily surrendered himself for trial. He was warned by some that he would not get a fair trial, but others who had some knowledge of the evidence declared that there was no chance of a conviction. It turned out that the former group were correct, with the judges actively looking for the most tenuous and unlikely scenario that might suggest guilt, and preferring it to the far more probable interpretation that suggested innocence. They then simply filled in the (enormous) gaps with speculation and supposition.
So Megrahi was sentenced, and served over ten years. He developed a fatal illness in prison, while the system was taking seven years to allow his appeal to come to court. The appeal was given a protracted timetable, with long gaps in the proceedings, which took its estimated completion date to several months beyond Megrahi's then-estimated life expectancy.
Nobody in Libya thought he did it. He was regarded as a hero for having sacrificed his liberty in order to get the sanctions lifted. That was why he was met at the airport by a welcoming party. That was why he was promptly ushered into consultations with some top oncologists (nationality a bit unclear), and every possible treatment option explored. It doesn't seem likely to me that under those circumstances anyone would have been sourcing cheap Indian knock-off chemotherapeutic agents.
If, after all that, the "rebels" snatch him and either kill him or hand him over to the Americans, that will be the ultimate betrayal.
Rolfe.