Many people on the Internet sell "herbal Cialis" as an alternative treatment for erectile dysfunction (ED). However, at this point, no supplements or herbs have been shown to be effective at treating this condition. Also, there are many things that you should be aware of before taking any herbal medicine, including herbal Cialis. For example, the active ingredients in many herbs and herbal supplements are not known -- and some herbal supplements have been found to be contaminated with metals, unlabeled prescription drugs, microorganisms, or other substances. If you are thinking of taking herbal Cialis, talk with your healthcare provider.

• The fact that an herbal supplement is labeled "natural" does not mean it is safe or without any harmful effects. For example, the herbs kava and comfrey have been linked to serious liver damage.
   
• Herbal supplements can act in the same way as drugs. Therefore, they can cause medical problems if not used correctly or if taken in large amounts. In some cases, people have experienced negative effects even though they followed the instructions on a supplement's label.
   
• If you use herbal supplements, it is best to do so under the guidance of a medical professional who has been properly trained in herbal medicine. This is especially important for herbs that are part of an alternative medical system, such as the traditional medicines of China, Japan, or India.
   
• In the United States, herbal and other dietary supplements are regulated by the U.S. Food and Drug Administration (FDA) as foods. This means that they do not have to meet the same standards as drugs and over-the-counter medications for proof of safety, effectiveness, and what the FDA calls Good Manufacturing Practices.
   
• The active ingredients in many herbs and herbal supplements are not known. There may be dozens, even hundreds, of such compounds in an herbal supplement. In fact, some herbal supplements have been found to be contaminated with metals, unlabeled prescription drugs, microorganisms, or other substances.