Historically, the root has been used as medicine by Native American and Hispanic cultures.

Today, osha is used for sore throat, bronchitis, cough, common cold, influenza, swine flu, respiratory, and pneumonia. It is also used to treat other viral infections including herpes and AIDS/HIV. Some people use it for indigestion.

Some people apply osha directly to the skin to keep wounds from getting infected. Osha contains chemicals that might help fight bacterial and viral infections.

Osha, just like echinacea and zinc, is thought to work best when used in the early stages of the flu; basically, as soon as you realize you’re sick. It’s an antibacterial and antiviral herb, best known for its ability to soothe a sore throat, treat a cough, and relieve inflammation of the bronchial tubes. For a fever that won’t go away, it could promote sweating and help kick out the flu virus before it has a chance to turn full-blown.

It was both a sacred and indispensable herb to many tribes of Native Americans including the Zuni, Aztec, Chiricahua, Yaqui, Tarahumara, and Mescalero Apache tribes. Some burned it as a purifying incense for protection from evil spirits and dangerous pathogens. Osha has been fervently used for centuries, in ways similar to Echinacea.

Native American runners chewed roots for increased endurance. Attached to moccasins or tied about the ankle it was used to protect the wearer from rattlesnakes.

Flathead tribe members ritually washed freshly harvested roots in streams near plant growth locations to precipitate rainfall in times of drought. Fresh or dried root brings a tingling sensation to tongue and gums.

To make osha tea, take whole or powdered dried roots and steep them in boiling water for 10 to 15 minutes. Take three or four cups a day.

Special Precautions & Warnings:
Pregnancy and breast-feeding: It’s UNSAFE to take osha if you are pregnant. It might start menstruation, and this might cause a miscarriage. Avoid use.

Botanical Name: ligusticum porteri
Origin: Powder: USA; Whole: USA
Notes: Kosher. Non-irradiated. No known allergens. aka Bear Root, Chuchupate, Colorado Cough Root, Indian Parsley, Ligusticum porteri, Mountain Lovage, Perejil de Campo, Persil Indien, Porter's Licorice Root, Racine d’Ours, Wild Celery Root. 
Specifications are subject to change without notice.
* FDA Disclaimer

Reference
webmd
Doctor's Health Press