Wikipedia is pretty reliable for math, old computer hardware, and other dry technical subjects.
This is not one. This is a political subject. Wikipedia is a complete disaster for anything that even remotely touches upon modern politics. There are teams of people paid to impose an opinion on Wikipedia, relentlessly wearing down any neutral editor with 24x7 edits and every kind of bureaucratic fight. The people who edit for free are also pulled from a highly-biased population, with strong overrepresentation by unemployed single people with non-STEM degrees.
Simply put, "ineffective and may cause dangerous side effects" is a purely political attack on the US president.
Last year, the drug was handed out freely, with very little worry, to anybody claiming that they would visit a country with malaria. In many places it is non-prescription. Clearly, the "dangerous side effects" aren't such a big deal. You can get deadly "dangerous side effects" from aspirin (Reye syndrome) and from Tylenol/paracetamol/acetaminophen (complete liver failure).