Many medicines, including diet pills, antihistamines, decongestants, and some herbal products, can cause heart palpitations. Nearly everyone has palpitations from time to time. Depending on your symptoms, your doctor may need to do more tests to try to find the cause of your palpitations.
Can antihistamines raise heart rate?
“In general, antihistamines are safe in patients with high blood pressure and other forms of heart disease,” explains Richard Krasuski, MD, director of adult congenital heart disease services at the Cleveland Clinic in Ohio, but an antihistamine may elevate blood pressure or increase heart rate, according to the U.S. …
Can allergy medicine make your heart race?
Cough, Cold, and Allergy Medicines
Many over-the-counter decongestants have pseudoephedrine or phenylephrine. These ingredients can cause heart palpitations or raise your blood pressure.
Can antihistamines cause heart arrhythmias?
Some second-generation antihistamines, notably terfenadine and astemizole, have been associated with prolongation of the QT interval and the development of torsades de pointes, a potentially fatal ventricular arrhythmia.
Are antihistamines not good for heart patients?
Antihistamines, which are commonly used to treat symptoms such as a runny nose or sneezing, are generally safe for patients with abnormal heart conditions. However, the FDA has warned that antihistamines taken in conjunction with some high blood pressure medications may cause a spike in blood pressure.
How do you calm a racing heart?
If you think you’re having an attack, try these to get your heartbeat back to normal:
- Breathe deeply. It will help you relax until your palpitations pass.
- Splash your face with cold water. It stimulates a nerve that controls your heart rate.
- Don’t panic. Stress and anxiety will make your palpitations worse.
Why is my heart beating so fast for no reason?
Most of the time, they’re caused by stress and anxiety, or because you’ve had too much caffeine, nicotine, or alcohol. They can also happen when you’re pregnant. In rare cases, palpitations can be a sign of a more serious heart condition. If you have heart palpitations, see your doctor.
Can histamine cause heart palpitations?
At low levels, histamine increases stomach acid, which helps kill off any bacteria we may be exposed to. However, at high levels, histamine may trigger nausea, diarrhea, heart palpitations and dilation of blood vessels may cause a severe headache.
Can Claritin cause palpitations?
Pseudoephedrine may cause mild CNS stimulation in hypersensitive patients. Nervousness, excitability, restlessness, dizziness, weakness, or insomnia may occur. Headache, drowsiness, tachycardia, palpitation, pressor activity, and cardiac arrhythmias have been reported.
When should I be worried about heart palpitations?
If your palpitations are accompanied by dizziness, fainting, shortness of breath, or chest pain, you should seek medical attention. “Palpitations can be caused by a wide range of abnormal heart rhythms.
What are the side effects of antihistamines?
Side effects of antihistamines
- sleepiness (drowsiness) and reduced co-ordination, reaction speed and judgement – do not drive or use machinery after taking these antihistamines.
- dry mouth.
- blurred vision.
- difficulty peeing.
Can Benadryl cause irregular heartbeat?
Diphenhydramine and the older antihistamines are known for their anticholinergic and sedative side effects. They also have been proposed to cause arrhythmias.
Can allergies cause tachycardia?
These data indicate that histamine is mainly responsible for hypotension and tachycardia secondary to the release of catecholamines associated with anaphylaxis. However, these observations suggest that histamine may be involved in arrhythmias and ischaemic changes that can also be a cause of death in anaphylaxis.
Does Zyrtec make your heart race?
For allergy sufferers with heart disease, medicines such as Allegra, Zyrtec or Claritin should be safe. However, medicines containing decongestants — including Allegra-D, Zyrtec-D and Claritin-D — could increase your blood pressure and heart rate or interfere with your heart medication.