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Medically reviewed by Last updated on Jun 18, 2021.

What are other common names?

  • Allium sativum
  • Aged Garlic Extract
  • Ail
  • Ajo
  • Allium
  • Camphor of the Poor
  • Clove Garlic
  • Da-Suan
  • Garlic Clove
  • Garlic Oil
  • La-Suan
  • Nectar of the Gods
  • Poor Man's Treacle
  • Poorman's Treacle
  • Rason
  • Rust Treacle
  • Rustic Treacle
  • Stinking Rose

What is this product used for?

Garlic is used by some people as medicine. Science currently does not support the use of this product for any health problem.

What are the precautions when taking this product?

  • Always check with your doctor before you use a natural product. Some products may not mix well with drugs or other natural products.

  • This product may interfere with some lab tests. Be sure to talk with your doctor about this and all drugs you are taking.

  • Be sure to tell your doctor that you take this product if you are scheduled for surgery or tests.

  • Take care if you use this product while breastfeeding.

  • Take extra care if you are taking drugs to thin your blood. These are drugs like warfarin (Coumadin), heparin, or enoxaparin (Lovenox).

  • Take extra care if you are taking drugs to dissolve blood clots. These are drugs like alteplase (Activase), reteplase (Retevase), or streptokinase.

  • Take extra care if you are taking drugs to help with swelling or inflammation. These are drugs like nonsteroidal anti-inflammatory drugs (NSAIDs), aspirin, ibuprofen (Advil), or naproxen (Naprosyn).

  • Take extra care if you are taking drugs to treat or prevent HIV.

  • Take extra care if you are allergic to pollens or plants like lilies, amaryllis, or asparagus.

  • Take extra care and check with your doctor if you have:

    • Asthma

    • Bleeding problems

    • Blood pressure problems

    • Diabetes

    • HIV

  • Keep hard candies, glucose tablets, liquid glucose, or juice on hand for low blood sugar.

What should I watch for?

  • Upset stomach

  • Stomach cramps

  • Bloating

  • Increased gas

  • May cause body odor or bad breath

  • Mouth sores

  • Rash

When do I need to call the doctor?

  • Signs of a very bad reaction. These include wheezing; chest tightness; fever; itching; bad cough; blue skin color; seizures; or swelling of face, lips, tongue, or throat. Go to the ER right away.

  • Signs of low blood pressure. These include feeling dizzy, weak, or tired; fainting; more thirst; or skin that is pale, cool, and clammy.

  • Signs of low blood sugar. These include hunger, dizziness, shaking, a fast heartbeat, confusion, or sweating.

  • Very bad throwing up

  • Very bad belly pain

  • Very bad loose stools

  • If you notice bloody or black, tar-like stools

  • Bruising or bleeding that is not normal

  • Changes in menstrual periods like lots of bleeding, spotting, or bleeding between cycles

Where can I learn more?

National Center for Complementary and Integrative Health

Last Reviewed Date


Consumer information use

This information is not specific medical advice and does not replace information you receive from your healthcare provider. Only your healthcare provider has the knowledge and training to provide advice that is right for you. You should not rely on this information in deciding whether or not to use, or accept your healthcare provider’s advice regarding use of, any natural products or similar treatments, therapies, or life-style choices. This information does not endorse any natural products or similar treatments, therapies, or life-style choices as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information. It does NOT include all information about natural products, possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to you. You must talk with your healthcare provider for complete information about your health and treatment options.


Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.