K-Cor 5 Tablet is used to treat angina pectoris (heart-related chest pain). It contains Nicorandil which works by widening blood vessels and reducing the heart's workload by making it easier for the heart to pump blood around the body. In some cases, this medicine may cause side effects such as headache, nausea, vomiting, dizziness, and weakness. Inform the doctor if you are pregnant or breastfeeding, taking any other medication, or have any pre-existing medical conditions.