09-07-2025
Photo: João Lima/NOVA FCT
Carlos Lodeiro Espiño, professor in the Department of Chemistry and researcher at the LAQV-REQUIMTE research unit at NOVA FCT, is leading a groundbreaking project to detect chemical submission drugs such as GHB and scopolamine – commonly known as "date rape drugs."
The project, developed in collaboration with the University of Valencia and the company Celentis, has already led to a joint patent and two scientific publications, and resulted in an innovative device currently being commercialized in Spain. The next step is its launch in the Portuguese market.
The bracelet detects the presence of these substances using just a drop of the drink, which can be applied directly or via a finger touch or even a small amount of saliva. It can be reused for up to five days or until it returns a positive result, and it provides an immediate indication of the presence and type of drug — such as GHB (gamma-hydroxybutyric acid or liquid ecstasy), scopolamine (burundanga), methamphetamines, ketamines, cathinones, among others. If positive, the user can avoid consuming the drink and immediately alert the authorities.
These drugs are easily accessible, inexpensive, and particularly difficult to detect in the body just a few hours after ingestion. Even with blood tests, confirming their presence is often impossible, complicating legal proof of the crime. That’s why early detection in the drink itself plays a crucial role in victim protection — and can also serve as criminal evidence.
“Our goal is to offer a simple, accessible, and effective tool to prevent sexual abuse crimes, especially in contexts where people are more vulnerable, such as nightclubs, bars, or festivals,” says Carlos Lodeiro Espiño.
The research team is already in contact with authorities, municipalities, and event organizers in Portugal to have the bracelet recognized as legal evidence and included in awareness and prevention campaigns, contributing to safer events.
This device comes at a time when warnings about the use of such substances in sexual assault cases in Portugal are on the rise. With this portable and instantly usable solution, anyone can test their drink and act in time — significantly improving prevention capabilities.