LenSen Extra/LenSen Forte may cause GI upsets or gastritis. Even though LenSen Extra/LenSen Forte belongs to the family of NSAIDs, it causes side effects associated with this class of drugs like hepatitis, nephropathy or bone marrow depression. Rarely, blurred vision, dizziness, oedema or rashes have been reported. There may be cross allergenicity with other NSAIDs.