TOLVAT 30MG TABLET is used to treat low sodium levels and autosomal dominant polycystic kidney disease. It contains Tolvaptan which works by increasing the amount of water released from the body via urine. In some cases, this medicine may cause side effects such as dizziness, headache, dry mouth, fatigue, diarrhoea, thirst and increased urge to urinate. Inform the doctor if you are pregnant or breastfeeding, taking any other medication, or have any pre-existing medical conditions.