By Dr. Liji Thomas, MD | Reviewed by Dr. Jennifer Logan, MD, MPH Skip to: Antihistamines Sedating antihistamines Central side effects Anticholinergic and alpha-adrenergic side effects Cardiac side effects Side effects with geriatric use Contraindications to sedating antihistamines Non-sedating antihistamines Conclusion Allergies have gone up by 40% in recent years, and allergy medications are being used more often than ever before. There are various types...