With HistaStop? Homeopathic Histamine & Quercetin Safe & Effective Formula Relieves Symptoms: Sneezing Runny Nose Sinus Congestion Itchy & Watery Eyes Homeopathic Remedy Homeopathy is a special approach to good health that works by stimulating your body s own natural defenses to fight hay fever and allergy symptoms. Indications: For the temporary relief of hay fever and pollen allergic symptoms of sneezing runny nose itchy and watery eyes plugged ears sinus congestion and headache. Allercetin? can be taken any time during hay fever season even before symptoms begin.