Interaction of some common herbs with other drugs & medicines
This list is not complete and serve more as an example of how some herbs can affect the activity of certain drugs.
| Herb | Interaction |
|---|---|
| Bromelain | Increase the risk of bleeding when already taking blood thinners. |
| Echinacea | May interact with immunosuppressive drugs. |
| Ephedra | May worsen the side effects of other types of stimulants. |
| Garlic | May increase the effect of blood thinners. |
| Ginko | May increase the effect of blood thinners. |
| Ginseng | May worsen the side effects of other types of stimulants. |
| Hawthorn | May increase the actions for some heart medicine and decrease their side effects. |
High-tannin herbs
 |
Reduce the absorption of most medicines and drugs. |
| High-berberine herbs | Counteract short-acting blood thinners. |
High-fibre herbs
 |
May delay the absorption of most drugs taken at the same time. |
| Liquorice | May worsen the effects medicines/drugs that cause loss of potassium. |
| Siberian ginseng | May increase the effects of antibiotics. |
| St John's wort | May increase the effects of narcotics and some antidepressants. |
| Valerian | May increase the effects sedatives. |