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Excellent for respiratory allergies but it can be $10-15s cheaper. Only the expensive price makes it 4 stars rather than 5 stars. I've allergies to food, pollens, dust that causes or produces histamine and which give the following symptoms: - nose cognition - runny, blocked nose - mucus running down to my throat and chest This natural medicine is effective that 1 bill makes an effect in 20-30 minutes. Only one time had to take 2 bills to see an effect. Dosage: Based on my experience, it did not matter whether I take it before the food causing the allergy or after. It was very effective anyway. Also, I have switched from taking a bill with the thing causing the allergy to taking one bill for 2 months; once per day. I have realized that even when I miss it in one day, I am ok. I really thank the producer and feel very happy about it :)