Taking one extra Olmesar A by mistake is usually not dangerous for most people, but it can sometimes cause low blood pressure, dizziness, or mild nausea. Sit or lie down if you feel dizzy, drink water, and monitor your blood pressure.

Headaches with high blood pressure can occur even while on long-term medication. Regularly monitoring blood pressure, staying hydrated, managing stress, and avoiding triggers such as excess salt can help. You should consult your doctor to check if your current treatment needs adjustment.