Health Guide


What is it?

Squill is an herbal medicine used to treat asthma and other breathing problems, such as whooping cough. It may also be used to increase (make more) urine flow and improve heart functioning. Squill may also cause vomiting (throwing up).

Other names for Squill include: Scilla, Urginea, Urginea Maritima Baker, Sea Onion, Sea Squill, Indian Squill, and White Squill.

Ask your doctor, nurse, or pharmacist if you need more information about this medicine or if any information in this leaflet concerns you.

Before Using:

Tell your doctor if you

  • are taking medicine or are allergic to any medicine (prescription or over-the-counter (OTC) or dietary supplement)
  • are pregnant or plan to become pregnant while using this medicine
  • are breastfeeding
  • stomach problems or ulcers
  • have any other health problems, such as high blood pressure or heart or blood vessel disease


Talk with your caregiver about how much Squill you should take. The amount depends on the strength of the medicine and the reason you are taking Squill. If you are using this medicine without instructions from your caregiver, follow the directions on the medicine bottle. Do not take more medicine or take it more often than the directions tell you to.

To store this medicine:

Keep all medicine locked up and away from children. Store medicine away from heat and direct light. Do not store your medicine in the bathroom, near the kitchen sink, or in other damp places. Heat or moisture may cause the medicine to break down and not work the way it should work. Throw away medicine that is out of date or that you do not need. Never share your medicine with others.

Drug and Food Interactions:

Do not take Squill without talking to your doctor first if you are taking:

  • Digoxin (Lanoxin(R)))


  • Before taking Squill, tell your doctor if you are pregnant or breastfeeding
  • Do not take Squill if you have heart, stomach, or intestine problems (1,3,4)
  • Do not take Squill if you have low potassium levels (7)

Side Effects:

Stop taking your medicine right away and talk to your doctor if you have any of the following side effects. Your medicine may be causing these symptoms which may mean you are allergic to it.

  • Breathing problems or tightness in your throat or chest
  • Chest pain
  • Skin hives, rash, or itchy or swollen skin

Other Side Effects:

You may have the following side effects, but this medicine may also cause other side effects. Tell your doctor if you have side effects that you think are caused by this medicine.

  • Vomiting (throwing up) that will not stop or that has blood in it, nausea (upset stomach) (1)
  • Heart beat changes or seizures (uncontrolled shaking) (1,2,6)


1. Newall CA, Anderson LA & Phillipson JD: Herbal Medicines. A Guide for Health-care Professionals. Pharmaceutical Press, London, UK; 1996.

2. Leung AY: Encyclopedia of Common Natural Ingredients Used in Food, Drugs, and Biologicals, 11th edition. Merck, Rahway, NJ; 1989.

3. Court WE: Squill - energetic diuretic. Pharm J 1985; 235:194-197.

4. Anon: Squill. In: DerMarderosian A (ed): The Lawrence Review of Natural Products. Facts and Comparisons Inc, St. Louis, MO; 2000.

5. Farnsworth NR: Potential value of plants as sources of new antifertility agents 1. J Pharm Sci 1975; 64:535-598.

6. Tuncok Y, Kozan O, Cavdar C et al: Urginea maritima (squill) toxicity. Clin Toxicol 1995; 33:83-86.

7. Fetrow CW & Avila JR: Professional's Handbook of Complementary and Alternative Medicines. Springhouse Corporation, Springhouse, PA; 1999: 618-620.

Last Updated: 7/4/2018
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