13 Dangerous Side Effects Of Cilantro You Should Know

Cilantro, also known as Coriandrum sativum, is a popular herb cherished for its fresh, citrusy flavor and aroma. Used worldwide in everything from Mexican salsa to Indian chutney, its culinary appeal is undeniable. However, while cilantro offers numerous health benefits, it’s important not to overlook the range of potential side effects and risks—especially for those with sensitivities, allergies, or underlying health conditions.

In This Article

• Top 13 Side Effects Of Cilantro
• Drug Interactions
• How To Safely Incorporate Cilantro Into Your Diet: Tips And Precautions
• Frequently Asked Questions (FAQs)
• Key Takeaways

Top 13 Side Effects Of Cilantro

Even though cilantro is generally safe when used as a food ingredient, overconsumption or individual sensitivities may result in a spectrum of side effects, ranging from mild gastrointestinal discomfort to severe allergic reactions. Here are the most significant risks associated with cilantro:

1. Liver Damage

   Large quantities of cilantro may exert stress on the liver. The herb contains volatile oils and active antioxidants, which at recommended amounts help detoxify the body. However, excessive cilantro can lead to elevated bile production and reverse those benefits, possibly contributing to liver dysfunction or exacerbating existing liver conditions. There is limited scientific data, but individuals with liver disease are advised to practice caution with cilantro intake.

2. Low Blood Pressure (Hypotension)

   Cilantro may lower blood pressure due to its vasodilatory effect and mild sedative properties. For people prone to low blood pressure or on antihypertensive medications, this can be problematic and may trigger dizziness, fainting, or an abnormal drop in blood pressure.

3. Stomach Upset

   While moderate amounts of cilantro can soothe digestive issues, excessive consumption can cause gastrointestinal complaints such as gas, stomach pain, abdominal cramps, and even vomiting or loose stools. One study showed that individuals who consumed 200 ml of a 10% cilantro extract over a week reported pronounced GI discomfort.

4. Diarrhea

   Consuming large quantities of cilantro or contaminated cilantro may result in diarrhea. Besides direct digestive irritation, cilantro has also been implicated in cyclosporiasis outbreaks (caused by Cyclospora cayetanensis), which brings about prolonged, watery diarrhea and flu-like symptoms.

5. Breathing Problems

   Some people experience respiratory issues after consuming cilantro. These may include coughing, wheezing, or difficulty breathing—especially for those with allergies. In rare cases, exposure can trigger anaphylaxis, a severe and potentially life-threatening allergic reaction.

6. Chest Pain

   Chest pain is a rare but possible adverse effect, potentially connected to allergic or hypersensitivity reactions. If chest discomfort occurs after eating cilantro, especially if accompanied by tingling or swelling, seek immediate medical help.

7. Skin Sensitivity

   Contact with cilantro, whether raw or as juice, can cause skin rashes, hives, or dermatological irritation in some individuals. This is particularly true for those with existing allergies or sensitivities. Symptoms can include redness, itching, and swelling.

8. Allergic Reactions

   Allergy to cilantro can present with:

   • Hives or urticaria
   • Facial, lip, or tongue swelling
   • Stomach pain, diarrhea, or vomiting
   • Coughing or throat tightness
   • In rare cases, anaphylaxis

   If any signs of a severe reaction occur (difficulty breathing, swollen throat, or loss of consciousness), seek emergency care.

9. Drug Interactions and Blood Clotting

   Cilantro may potentiate the effects of certain sedative medications, leading to excessive sleepiness or slow breathing. More critically, it can slow blood clotting, which poses risks for those with bleeding disorders, on anticoagulants, or scheduled for surgery.

10. Sleepiness and Sedation

    Coriander and cilantro have mild sedative effects. Excessive consumption or combining cilantro with other sedating drugs (such as barbiturates, benzodiazepines) may increase drowsiness or respiratory depression.

11. Kidney Problems

    There is some concern that high levels of oxalates in cilantro could contribute to kidney stone formation in sensitive individuals, especially if consumed in very large quantities.

12. Foodborne Illnesses

    Cilantro has occasionally been linked to outbreaks of foodborne illnesses, including cyclosporiasis, salmonella, shigella, and E. coli infections. This risk is especially concerning with imported or improperly washed cilantro.

13. Taste Aversion

    Though not a toxic effect, a significant portion of the population has a genetic predisposition (OR6A2 gene) that makes cilantro taste unpleasantly soapy.

Drug Interactions

Excessive cilantro intake can interfere with several drug classes:

• Anticoagulants and antiplatelet drugs: Cilantro’s effect on slowing blood clotting can increase the risk of bleeding when combined with these medications.
• Sedatives: The herb’s mild CNS depressant effect can amplify the sedative properties of drugs like benzodiazepines and barbiturates.
• Other herbs: If you are taking other herbal supplements with blood-thinning or sedative effects, combine with caution.

Always inform your healthcare provider about your cilantro intake if you are on any of the above medications, especially before surgery or when managing a chronic medical condition.

How To Safely Incorporate Cilantro Into Your Diet: Tips And Precautions

• Start with small quantities of cilantro in your diet and gradually increase if you experience no adverse effects.
• If you detect itching, swelling, rashes, or any unusual reactions, discontinue use immediately and if severe, seek emergency care.
• Cooking cilantro may reduce allergenic potential for some sensitive individuals. Adding herbs to hot dishes can be safer than using them raw.
• If you have a family history of allergies (especially to parsley, dill, or fennel), be particularly cautious with cilantro.
• If pregnant or breastfeeding, stick to food amounts rather than supplements or large medicinal doses, as safety is not well established.
• Wash cilantro thoroughly to minimize the risk of foodborne pathogens.
• Maintain a diary of your reactions if you suspect you are sensitive to cilantro, and share it with your healthcare provider.
• Consult a doctor if you have existing liver, kidney, or bleeding disorders before increasing your cilantro intake.
• Discontinue high intake of cilantro at least two weeks before any scheduled surgery.

Frequently Asked Questions (FAQs)

Is cilantro safe for everyone?

Cilantro is safe for most people when consumed in typical food quantities. However, individuals with allergies, liver or kidney disease, or those on blood-thinning or sedative medications should be especially cautious.

Can cilantro really cause allergic reactions?

Yes. Cilantro can cause allergic reactions, ranging from mild skin irritation to severe anaphylaxis. If you experience hives, facial swelling, difficulty breathing, or digestive distress after consuming cilantro, seek medical attention immediately.

Why does cilantro taste like soap to some people?

A segment of the population has a genetic variation that makes cilantro taste soapy, due to heightened sensitivity to aldehyde chemicals present in the herb.

Can cilantro worsen existing health conditions?

People with bleeding disorders, liver or kidney problems, or severe allergies should avoid large amounts of cilantro. It can interfere with medications and exacerbate these health concerns.

Is it safe to eat cilantro during pregnancy or breastfeeding?

There is not enough scientific information to prove the safety of medicinal or supplemental doses of cilantro during pregnancy or breastfeeding. Consuming normal food amounts is considered safe.

What should I do if I have an allergic reaction to cilantro?

For mild reactions, antihistamines may help. Severe reactions (trouble breathing, throat swelling, dizziness, or loss of consciousness) require immediate emergency treatment and use of an epinephrine injector if available.

Key Takeaways

• Cilantro can cause a range of side effects, from gastrointestinal discomfort and skin reactions to serious allergies and medication interactions.
• Consuming cilantro in moderation is the best way to enjoy its benefits while minimizing risks.
• Those with allergies to coriander, parsley, or related plants, or who have liver/kidney issues, should be especially cautious.
• Always wash cilantro thoroughly and discontinue use if you experience unusual or severe symptoms.
• Seek medical advice before using cilantro as a supplement, particularly if you are pregnant, breastfeeding, or taking chronic medications.

Note: This information is for educational purposes only. It is not intended as a substitute for professional medical advice. Always consult your healthcare provider regarding concerns about cilantro or any new supplement or dietary change.

Author

Sneha TeteBeauty & Lifestyle Writer

 

Sneha is a relationships and lifestyle writer with a strong foundation in applied linguistics and certified training in relationship coaching. She brings over five years of writing experience to thebridalbox, crafting thoughtful, research-driven content that empowers readers to build healthier relationships, boost emotional well-being, and embrace holistic living.

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