DAN Medical Frequently Asked Questions

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Calcium Channel Blockers (Cardizem, Caduet etc.)

Cardiovascular MedicationsMy high blood pressure is being treated with Cardizem. Can I dive while taking this?

Calcium channel blockers don’t typically pose problems for divers: they relax the walls of blood vessels, reducing blood flow resistance and thus lowering blood pressure. In some cases, especially in moderate doses, a change in position from sitting or lying down to standing may cause excessively low blood pressure and a subsequent momentary dizziness. This postural blood pressure change may be a cause for concern with divers, but calcium blockers appear to have no other adverse reaction for diving.