I deal with a lot of sinus issues and once my allergies start kicking in full gear, itchy throat, sore throat, runny nose, sneezing, nasal drip , you name it, even the headaches but that would come if I didn't get the nasal drip under control. This stuff literally stops all of it when I take it. As soon as I'm sneezing or have runny nose I take a pill and it goes away within 30-40 min. To me that's pretty fast relief. You may have to wait to take it a few time to notice so that it's in your system. I take a pill and then later in the day I take another. I'm tall and slim so I try not to take too much of anything at once because usually what's being instructed on the bottle is too much for me(Call it what you want). I'm not a vegetarian but I did the research and per a veterinarian,You can even give this to your dog in their food. I go by her weight so since she's about 60lbs I give her a full pill in a day. You can open it up and sprinkle some in their food and mix. I feed two separate servings a day to my dog so I give half the powder in the pill and then later give her the rest of it and mix with a little water in the food to help dissolve but that's optional. It has helped my dog as well. She gets bad seasonal allergies and itchy/ scabby skin. I truly believe this has helped her this year. She has not had itchy itchy skin as bad and no scabs detected so far. Like I said, I love this stuff. Since I purchased it I have NOT had to take a single allergy pill , maybe just my steroid inhaler but no pills. This is the only one I turn to now. No sinus infections so far since the spring has hit. I'm not a Dr and not a vet but if you asked me, I'd say give it a try. I'm definitely buying more of this when I'm done with the bottle