Peter Madden, the lawyer for the Irish woman held in Peru, expressed his concerns about the holding conditions the two women have been enduring.
He said neither of the women had been offered any food today, and authorities were not allowing family members to see the pair.
Melissa Reid and Michaela McCollum appeared in court in Lima, but it is unclear whether they have been charged, their lawyer said.
Two women accused of smuggling 12kg of cocaine into Peru could face up to three years in custody and a maximum of 25 years in prison.
A British woman accused of drug trafficking in Peru said she and her friend "were not smuggling for money, we were smuggling for our lives."