Ephedra, an herbal substance that contains a natural stimulant, ephedrine, is often used for weight control and has been linked to more than three dozen deaths.

He has the largest database on the herbal substances that can be used in cancer medicine.

Nearby, Market Spice (founded 1911) sells slightly less exotic herbal substances.

What, in a time of exploding interest and economic growth in natural herbal substances and medicines, is a drug?

Some visitors hang out here for months during the warmer seasons, either trekking or sampling the local herbal substances.

What nonprescription medicines, vitamins, or herbal substances you cannot take because of a possible bad interaction with your prescribed medicines.

When it is prepared, other herbal substances, such as ginseng, are added to the jelly to give it certain tastes and medicinal values.

Waidan refers to practices relating to the process of making an elixir often containing herbal or chemical substances found outside of the body.

One of the committee's most important tasks will be to set up a list of herbal substances.

The second aims at specifying the purpose of the list of herbal substances to be drawn up by the future committee on herbal medicinal products.