... horrible nose bleeds and has even been to the emergency room for them. She does have seasonal allergies, but can this be a possible side effect? She has never had nosebleeds this bad until recently starting this medicine. I believe her dose is way too high as well but the doctor that prescribed it insists it is right. She has also had a seizure but at the time was taking ambilify for sleep as well. They took her off the ambilify because of it but I am starting to think Vyvanse may have been the cause too. Also, she is nervous a lot and has started having horrible mood swings and melt downs.