Questions You Should Know about doctor plants

Herbal medicines are those with active ingredients made from plant parts, such as leaves, roots or flowers. But being "natural" doesn't necessarily mean they're safe for you to take.

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Just like conventional medicines, herbal medicines will have an effect on the body, and can be potentially harmful if not used correctly.

They should therefore be used with the same care and respect as conventional medicines.

If you're consulting your doctor or pharmacist about health matters, or are about to undergo surgery, always tell them about any herbal medicines you're taking.

Potential issues with herbal medicines

If you're taking, or plan to take, any herbal medicines, be aware of the following:

• They may cause problems if you're taking other medicines. They could make the other medicine less effective or cause the other medicine to trigger unexpected side effects.
• You may experience a bad reaction or side effects after taking a herbal medicine.
• Not all herbal medicines are regulated. Remedies specially prepared for individuals don't need a licence, and those manufactured outside the UK may not be subject to regulation.
• Evidence for the effectiveness of herbal medicines is generally very limited. Although some people find them helpful, in many cases their use tends to be based on traditional use rather than scientific research.

Certain groups of people should be particularly wary of taking herbal medicines.

Who should avoid herbal medicines?

Taking a herbal medicine may not be suitable for:

• people taking other medicines, including hormonal contraceptives, such as the combined pill
• people with serious health conditions, such as liver or kidney disease
• people who are going to have surgery
• pregnant or breastfeeding women
• the elderly
• children ' as with all medicines, herbal medicines should be kept out of the sight and reach of children

Speak to your doctor or pharmacist for advice before trying a herbal medicine if you fall into one of these groups.

Herbal medicines and surgery

It's important to tell your doctor if you take any herbal medicines before undergoing surgery.

This is because:

• some herbal medicines might interfere with anaesthesia and other medicines used before, during or after procedures
• some herbal medicines may interfere with blood clotting and blood pressure, which may increase the risk of bleeding during or after surgery

Your doctor may therefore advise you to stop taking any herbal medicines during the weeks leading up to your operation.

What to look for when buying a herbal medicine

If you want to try a herbal medicine, look out for a traditional herbal registration (THR) marking on the product packaging.

This means the medicine complies with quality standards relating to safety and manufacturing, and it provides information about how and when to use it.

But you should be aware that:

• THR products are intended for conditions that can be self-medicated and don't require medical supervision, such as coughs, colds or general aches and pains
• using THR products for more serious conditions could be harmful, especially if you delay seeking medical advice
• claims made for THR products are based on traditional usage and not on evidence of the product's effectiveness
• a THR mark doesn't mean the product is completely safe for everyone to take

You can find THR-registered products in your local health shop, pharmacy or supermarket.

Risks of buying herbal medicines online or by mail order

The risks of obtaining fake, substandard, unlicensed or contaminated medicines are increased by buying medicines online or by mail order.

Unlicensed herbal medicines manufactured outside the UK may not be subject to regulation.

They may be copies of licensed medicines, but made in unlicensed factories with no quality control.

Some websites may appear to be legitimate, but are fronted by people pretending to be doctors or pharmacists. 

Herbal products sold online may also contain banned ingredients and toxic substances.

You can find a list of banned and restricted herbal ingredients on the GOV.UK website.

Herbal slimming products and products that claim to improve sexual performance, for example, are best avoided.

This is because they have been found to contain dangerous ingredients, including pharmaceutical ingredients, that aren't stated on the label.

Reporting side effects

You can report any side effect or adverse reaction to a herbal medicine using the Yellow Card Scheme run by the Medicines and Healthcare products Regulatory Agency (MHRA).

This can help the MHRA identify new side effects or risks associated with medicines, including herbal remedies.

You should report adverse reactions or side effects if:

• you suspect the side effect or adverse reaction was caused by a conventional medicine or herbal medicine you were taking
• the side effect occurs when you're taking more than one medicine or herbal medicine

It's important to include as much detail as possible, particularly any brand name or manufacturer's details relating to the herbal medicine.

In the past, Yellow Card reports have been used to identify interactions between St John's wort and other medicines, and to highlight the use of dangerous substances like mercury, lead and arsenic in unlicensed Ayurvedic and traditional Chinese medicines.

Page last reviewed: 18 October
Next review due: 18 October

What is herbal medicine?

Herbal medicine has its origins in ancient cultures. It involves the medicinal use of plants to treat disease and enhance general health and wellbeing.

Some herbs have potent (powerful) ingredients and should be taken with the same level of caution as pharmaceutical medications. In fact, many pharmaceutical medications are based on man-made versions of naturally occurring compounds found in plants. For instance, the heart medicine digitalis was derived from the foxglove plant.

Active ingredients and herbal medicine

Herbal medicines contain active ingredients. The active ingredients of many herbal preparations are as yet unknown. Some pharmaceutical medications are based on a single active ingredient derived from a plant source. Practitioners of herbal medicine believe that an active ingredient can lose its impact or become less safe if used in isolation from the rest of the plant.

For instance, salicylic acid is found in the plant meadowsweet and is used to make aspirin. Aspirin can cause the lining of the stomach to bleed, but meadowsweet naturally contains other compounds that prevent irritation from salicylic acid.

According to herbal medicine practitioners, the effect of the whole plant is greater than its parts. Critics argue that the nature of herbal medicine makes it difficult to give a measured dose of an active ingredient.

Medicinal uses for specific herbs

Herbal medicine aims to return the body to a state of natural balance so that it can heal itself. Different herbs act on different systems of the body.

Some herbs that are commonly used in herbal medicine, and their traditional uses, include:

Do not self-diagnose ailments

It is very important that people do not self-diagnose any health conditions. Any medication (herbal or otherwise) should be taken under the supervision of a knowledgeable and qualified practitioner.

Special considerations for herbal medicine

Herbal medicines can be mistakenly thought to be completely safe because they are 'natural' products. This is not always correct.

Herbal medicines may produce negative effects that can range from mild to severe, including:

• allergic reactions

  and rashes

• asthma

  dr plant Product Page

• headaches

• nausea
• vomiting

• diarrhoea

  .

Like other prescription medications, herbal medicine should always be prescribed by a qualified and registered practitioner. Contact the professional association for your chosen therapy and ask for a list of members in your area. This may include:

During the first visit with your practitioner, ask about their training and qualifications. Be very cautious about any practitioner who advises you to abandon your conventional medical treatment.

Always tell your herbal medicine practitioner:

• which over-the-counter, herbal medicines,

  complementary medicines

  and

  prescription medications

  you are taking
• any

  allergic reactions

  you have experienced
• if you are

  pregnant

  , planning to become pregnant, or

  breastfeeding

  .

Be aware herbal medicine can interact with other medications

Herbal medications and supplements may interact in harmful ways with over-the-counter or prescription medicines you are taking.

Taking herbal supplements may increase or decrease the effectiveness of other drugs you are taking or may increase the risk of negative side effects. For example, St John's Wort mostly decreases the effectiveness of other medicines but increases the effects of antidepressants.

If you are considering taking herbal medicines, it is always a good idea to talk to your doctor about possible side effects and interactions with other medications you are taking.

Purchase herbal medicine products from a reputable supplier

Not all herbal medicines that are sold are safe. Always purchase from a source that stocks products from a reputable manufacturer or supplier, such as health food stores, supermarkets, pharmacies or from a reputable practitioner.

Be careful about purchasing herbal medicines over the internet. Unregulated herbal medicines from overseas may not be manufactured to the same quality and standard as regulated medicines. In some cases, products purchased online have been found to have dangerous levels of lead, mercury or arsenic, which can cause serious health problems.

Herbal medicines made in Australia are subject to regulations. Consult with your pharmacist about the safety and effectiveness of the herbal medicine or supplements you are thinking of buying. If you are considering taking herbal medicine, it is recommended that you:

• Never stop taking prescribed medications without consulting your doctor.
• Always tell your doctor if you are planning to start a course of herbal medicine for your condition.
• Seek advice from your qualified health practitioner, your doctor or your pharmacist about the herbal medicine's safety, quality and effectiveness.
• Always purchase products from a reputable source. Be cautious about buying herbal medicines or supplements manufactured overseas.
• Take all herbal medicines strictly as prescribed and consult your health practitioner immediately if you experience any side effects.

Where to get help

• Your

  GP (doctor)

• A qualified herbal therapist or naturopath
• Your

  pharmacist

• Medicines

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