Negative gastrointestinale reaktioner som kvalme (5 - 28%), opkastning (1 - 13%) og diarré (3 - 12%) såvel som træthed (2 - 48%), hovedpine (1 - 23%) og nedsat appetit (1 - 22%) er rapporteret under behandling med cladribine.
Gastrointestinal adverse events like nausea (5 - 28%), vomiting (1 - 13%), and diarrhoea (3 - 12%) as well as fatigue (2 - 48%), headache (1 - 23%), and decreased appetite (1 - 22%) have been reported during treatment with cladribine.