https://sci-hub.si/https://www.sciencedirect.com/science/article/pii/S0166354220301145
$5 per dose: https://en.wikipedia.org/wiki/Chloroquine
edit. The UK banned the export of the drug on Feb 25 and March 14: https://www.gov.uk/government/publications/medicines-that-cannot-be-parallel-exported-from-the-uk#history
unfortunately, according to WIki "there is not enough evidence to determine whether chloroquine is safe to be given to people aged 65 and older. However, the drug is cleared by the kidneys and toxicity should be monitored carefully in people with poor kidney functions"
You got your info from Wiki and want to poo poo irl new studies because of wiki? You deserve corona.