Colombia's Justice Minister, Ruth Stella Correa, has said a new drugs bill would decriminalise personal use of synthetic drugs, such as ecstasy.
The proposal would replace current laws, which ban cocaine and marijuana, although people are not prosecuted for possessing small amounts.
Colombia's legislation is being re-assessed in an attempt to tackle drug use, trafficking and related issues.
Critics say the inclusion of synthetic drugs will only confuse the debate.
The justice minister spoke after a meeting with the commission set up to assess the government's drug policies over the last 10 years.
Former President Cesar Gaviria is part of the group along a number of experts and academics expected to produce a document with recommendations within eight months.
Ruth Stella Correa pointed out that the Constitutional Court had already spoken against the criminalisation of people carrying small amounts of marijuana and cocaine.
"The new statute to be presented to the Congress during this mandate intends to make this authorisation concrete, but broadening it to include synthetic drugs into what is defined as the personal dose", the minister told Colombia's National Radio.
