In general, veterinarians do not use herbs or supplements to treat respiratory problems in rabbits (or any problems in most animals, period). To the best of my knowledge, there is no validated herb that can be used for this purpose.
Herb Treat died on 1947-04-19.
Herb Treat was born on 1900-12-16.
Aside from its use as an energy booster, some people use the herb to treat chronic fatigue syndrome, ulcers, anxiety, menstrual problems, impotence, and menopausal symptoms.
Devils claw
marijuana marijuana
The Manjishtha herb is beneficial in treating many different problems, including arthritis.
Chloroform was used for pain when available. If chloroform was not available whiskey was used for the pain. Then to treat the wounds herb's were used.
There are a variety of herbal products that are promoted as "natural alternatives to treat [fill in the blank]". However, for the most part, there is no good science behind these treatments. Also, at least in the United States, herbal products and vitamin supplements are marketed as "food" rather than as "medication", so their concentration, potency and effect are not regulated or monitored. You can try some herbal products to see if they help manage your respiratory problems, but it is not likely that they will fully treat the issues.
Convulsions and fatalities have been linked to the use of African herb concoctions known as imbiza, used for male erectile problems.
See link. Capsicum taken orally can cause a change in the amount of urine, and is implicated in some liver problems.
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Coriander is more commonly known as Cilantro, which is an herb. Rabbits can eat this, but not too much. A recommended vegetable diet for rabbits is 1 cup of vegetables for every 3 pounds of weight the rabbit is. For example, if a rabbit is 6 pounds, it should eat 2 cups of vegetables everyday. Remember variety, though.