Nigerian researcher says pepper fruit can be replacement to toxic synthetic drugs

Preye Campbell

Pain sufferers across Nigeria may soon trade their blister-packs of diclofenac for a handful of spicy pepper fruit – the glossy black berries of Dennettia tripetala that grow wild from Calabar to Makurdi.

A University-of-Uyo team led by natural product researcher Dr Enema Onojah John has isolated three powerful constituents of the root; docosanoic acid, quercetin and vitexin and demonstrated that they cut inflammatory pain in mice by as much as 72 percent, outperforming the gold-standard NSAID indomethacin at similar doses.

The findings, published this year in the Journal of Advances in Medicine and Medical Research and Medical Science: Trends and Innovations, confirm decades of folk wisdom that pepper fruit “warms the belly and cools the joints.”

Why look for alternatives? A 2023 Lagos study of construction workers revealed that 62 percent self-medicated with diclofenac and nearly one-fifth reported stomach pain or dizziness, classic NSAID side-effects linked to gastrointestinal damage and kidney strain. Broader international data show non-selective NSAIDs carry a four-fold increase in upper-GI bleeding compared with modern COX-2 inhibitors, putting frequent users at needless risk.

“Synthetic drugs work, but their toxicity ceiling is low. Pepper fruit offers comparable efficacy with a much gentler safety profile,” Dr Enema told reporters from his lab showing them the beautiful aroma of the fruit.

Using gas-chromatography–mass-spectrometry and NMR, the researchers pinpointed how the fruit’s compounds inhibit cyclo-oxygenase enzymes, the same pathway targeted by ibuprofen, while in-silico docking suggested even tighter binding than aspirin. Unlike many plant extracts, D. tripetala showed no signs of liver or kidney toxicity in animal models, and its essential oil has long been recognised for analgesic and anti-inflammatory properties.

A Local pharmaceutical company has already inked a memorandum of understanding to begin formulation of standardized pepper-fruit extract in a polyherbal formulation, with Phase I human safety trials projected for 2026-2027. “If we can validate the bio-availability and control dosing, this could become Nigeria’s first indigenous OTC pain-relief brand,” says Dr Enema.

Beyond health benefits, advocates tout economic and environmental dividends. Pepper fruit trees thrive in secondary forests and home gardens, require minimal agro-chemicals, and offer farmers a premium crop for the phytopharma market.

The National Institute for Pharmaceutical Research and Development is drafting guidelines to ensure sustainable harvesting and equitable royalties to communities supplying raw material.

“Turning a backyard spice into a blockbuster analgesic keeps value-addition in Nigeria,” notes Dr Enema.

For millions who reach reflexively for synthetic pills, pepper fruit may soon provide a home-grown, stomach-friendly alternative.

As Dr Enema puts it: “Pain relief shouldn’t come with an ulcer warning. Sometimes the solution is already hanging on our village trees, we just needed science to prove it.”