Do not use CARDAMYST if you:
- are allergic to CARDAMYST or to any of its ingredients. See the end of the Patient Information document for a complete list of ingredients in CARDAMYST.
- have limitations in activities due to heart failure (moderate to severe heart failure).
- have Wolff-Parkinson-White (WPW) syndrome, Lown-Ganong-Levine (LGL) syndrome, or an abnormal heart rhythm pattern called pre-excitation (delta wave) on an electrocardiogram (ECG).
- have sick sinus syndrome without a permanent pacemaker.
- have second degree or higher atrioventricular (AV) block.
Before using CARDAMYST, tell your healthcare provider about all of your medical conditions, including if you:
- have a history of fainting.
- have low blood pressure.
- are pregnant or plan to become pregnant. It is not known if CARDAMYST will harm your unborn baby.
- are breastfeeding or plan to breastfeed. It is not known if CARDAMYST passes into your breast milk. You should stop breastfeeding for 12 hours after treatment with CARDAMYST. During this time, pump and throw away your breast milk. Talk to your healthcare provider about the best way to feed your baby after using CARDAMYST.
Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements.
What are the possible side effects of CARDAMYST?
CARDAMYST may cause serious side effects, including:
Fainting due to CARDAMYST effects on blood pressure, heart rate, and electrical activity of the heart.
CARDAMYST may cause dizziness and fainting, especially in people with a history of fainting and certain heart problems, or people with a history of fainting during an episode of PSVT. Use CARDAMYST while sitting in a safe area where you will not fall if you become dizzy or lightheaded. Lie down if you feel dizzy or lightheaded after using CARDAMYST. If fainting occurs after using CARDAMYST, caregivers should place you on your back and seek medical help.
The most common side effects of CARDAMYST include:
- nasal discomfort
- nasal congestion
- runny nose
- throat irritation
- nosebleed
These are not all of the possible side effects of CARDAMYST.
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
What is CARDAMYST?
CARDAMYST is a prescription medicine used to help restore normal heart rhythm in adults who have symptoms of sudden episodes of fast heartbeat called paroxysmal supraventricular tachycardia (PSVT).
It is not known if CARDAMYST is safe and effective in children.
Please click for the Patient Information.
