Does CBD lower my blood pressure immediately or do I have to take it for a longer period of time to get results?

Individuals react to CBD differently. You may have to build CBD in your system before you start getting the effect. Just start with the lowest dose possible, slowly increase the dosage until you find a 'sweet spot' with a notable reduction in blood pressure. Different CBD forms have different bioavailability. You can use tincture oils as they are absorbed quickly by the body.