The recommended dosage of chloroquine for treatment of an active malaria infection is 1000 milligrams per day on the first day, followed by an additional 500 mg 6 to 8 hours later followed by 500 mg per day for three days afterwards. There are slight variations of this regimen recommended by different clinical sites. The point here being that if this man and his wife both became critically ill less than an hour after…
They said it was a teaspoon of Chloroquine Phosphate. I can't find what the density of Chloroquine Phosphate is anywhere, but if it were only as dense as water, that would be 5 grams, which is 5x the first day dose for treating Malaria.
Edit: it seems they really did just swallow a teaspoon without even checking dosage or a single other thing... I really wonder that the hell they were thinking.