Sorry to hear. I just had my First Reclast a week ago Today on the 19th. Exactly out of nowhere I passed out. No warning nothing. Hit my head pretty hard. I called the nurse that gave me the infusion and was told. It’s NOT from Reclast You have the flu call your Primary. I had cat scan, X-rays and bloodwork. They look good Thank God. But last night I woke up with bad pain on my left side of the head. I contacted my primary and waiting for a response.