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Starting a new medication and dealing with dizziness right away is really tough — especially when you're already managing so much. It's good that you're aware dizziness and headaches are known side effects of sildenafil. They happen because the medication widens blood vessels in the lungs, but can also lower blood pressure Show Full Answer

Starting a new medication and dealing with dizziness right away is really tough — especially when you're already managing so much. It's good that you're aware dizziness and headaches are known side effects of sildenafil. They happen because the medication widens blood vessels in the lungs, but can also lower blood pressure throughout the rest of the body. There are a few things that may be contributing to the dizziness beyond just the medication itself:

- Iron deficiency — This is actually very common in people with PAH (around 40% have it) and can cause dizziness on its own
- Reduced blood flow to the brain — PAH can make it harder for oxygen-rich blood to reach the brain, which adds to lightheadedness
- The medication lowering blood pressure too quickly — This is a known effect of sildenafil

Since you just started sildenafil yesterday, it's really important to contact your healthcare provider soon to let them know about the dizziness. They may want to adjust your dose or monitor how your body is responding, especially given your other health considerations.

If the dizziness becomes severe or you feel faint, seek medical help right away — don't wait.

 AI-generated responses are not a substitute for medical advice. These services are not intended to diagnose, treat, or cure any condition or disease. Always ask your doctor about specific health concerns.

Dizziness in PAH: Causes, Treatments, and More