From forest to pharma: Mapping Nigeria’s medicinal heritage 

Sir: Twenty years ago, four everyday plants—Piper guineense, Eugenia caryophyllata, Pterocarpus osun and Sorghum bicolor—were turned by Nigerian scientists into Niprisan, the world’s first FDA-orphan-designated sickle cell phytodrug, proving that the nation’s forests are a bona fide pharmaceutical pipeline.