"Only second day of use, so I can't speak to the long-term efficacy. But so far, it works as stated--and exceeded expectations.

My dog has collapsing trachea (which can be treated/managed with an operation, but at 12 years old, this is not a viable option), and after trying a bronchodilator, she had an allergic reaction (which fyi for those that don't know -- tagamet and the bron combo made it so she basically overdosed on the bron, increasing her blood plasma of the bron med (due to the tagamet) by approximately 70%! for a small dog!), and foolishly, at the recommendation of her vet, gave it to her again (each subsequent allergic reaction is almost invariably more severe than the initial) with a steroid--to ostensibly avoid another reaction (I usually try to extensively research drug interactions and the like; however was very busy so entrusted the vet, who usually is pretty good, but not this time), and again---severe reaction, much worse...as in..could hardly walk at all. She was okay about a week or so later. It was terrible. After that, I knew I needed to find an alternative and less toxic treatment regime---and I was not interested in the vet's recommendation given that it was well documented that she had been taking tagamet for over a year for part of her cancer treatment/management. Thus...after extensive research, I came upon mullein thapsus. So, I gave it a go. Her coughing and wheezing has decreased by about 85%! I hope a tolerance won't develop, because thus far; albeit only two days, I am so pleased and amazed that something actually worked!!

At present, I treat her with roughly 1ml 2-3x/day. I put it in her food and add a little water to dilute some of the taste.

In short, it works!! Excellent product thus far.

I'm thinking of getting myself some for the winter.

Edit: almost a week later... I am going to maintain the 5 stars because at the time that I wrote the review, it really did help her to stop coughing and at present, I continue to use it, and it works...okay (goes well with honey). However, she was diagnosed with collapsing trachea and a bronchial infection. The latter is new since the review (secondary infection due to primary issue), and it didn't help too much with the bronchial cough; however, for mild coughs, this is a great to have part of one's treatment approach. In sum, I would have to say that for mild coughing, this is excellent; however, for "the real deal"/"heavy hitters" this only helps a little, but a little is something when nothing seems to work. That said, I will definitely buy again."

"I just updated my review for you guys looking for relief.
Since we've had this stuff we no longer have to use Albuderol on by weekly basis.
Together with peppermint oil this stuff and Alegra allergy is what pulls us through.
I play by ear. I use alegra when I hear raspy breath coming on and I'll give my son 15 drops of this a few hours later or that night. We don't do both together. Sometimes this stuff alone will do the trick. And I'm talking in a matter of 5-10 minutes.

Also we use peppermint essential oil a lot to dab on his shirt or side of pillow case. Especially on rainy days.
He is six and since we moved to VA from TX he developed this horrible cough that would come on very sudden and strong and almost put him in a state of emergency. He had many episodes and was put on Albuderol frequently.
Now it's been quite a few months and we had one episode only where it used to be every other week. I was losing my mind.
There was also one other instance where I thought we are losing the battle again and I have him some colloidal silver in nebulizer with distilled water. That was where it stopped.
So thus far we are ok. And believe me if you have a child that has this condition you may have been to the emergency room or even hospital. Don't give up.
I wish One day we can stop taking Alegra as well. We are working on it. Thus far not having to breathe the fumes of Albuderol is good enough for us and this product is a must have I think.
Although it looks and smells crazy. Like cigarette water. If tastes ok and my son takes it very well.
Will definitely take it with us when traveling and make sure we don't run out.

Update June 7th
Laying next to my feverish child at this very moment. He's battling one of these sudden viruses he picked up in school. Usual scenario was high sudden fever and raspy cough and heavy weezing. With Albuderol every 4 hours.
Well this is a first time he is actually sick but breathing like a healthy person. Wow. The lungs are clear. And I only gave him this extract yesterday. A dropper as it comes when you pull it in once. Under tongue. Followed by water.
Amazing. This must be helping.
He has taken Allegra as usual. That alone never did the trick though.
Also 2 peppermint oil drops on the sheet next to his pillow where face or hands don't touch it."

"Awesome product, worth the wait...takes over a week to arrive but worth it"