Health Guide


What is it?

Whey is a dietary supplement used in cancer prevention and treatment, for babies and malnourished people to help them gain weight, as a substitute for cow milk in allergic children, to treat phenylketonuria, and to help prevent tooth plaque and cavities.

Other names for Whey include: Whey protein.

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
  • have other health problems, such as high blood pressure or heart or blood vessel disease


Talk with your caregiver about how much Whey you should take. The amount depends on the strength of the medicine and the reason you are taking Whey. 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 Throw away medicine that is out of date or that you do not need.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.


  • Before taking Whey, tell your doctor if you are pregnant or breastfeeding
  • Do not take Whey if you are allergic to milk (2)

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.

  • Infants may get colic from Whey use (3)
  • Vomiting (throwing up), itchy skin, and runny nose (4,5)


1. Kennedy RS, Konok GP, Bounous G et al: The use of a whey protein concentrate in the treatment of patients with metastatic carcinoma: A phase I/II clinical study. Anticancer Res 1995; 15:2643-2650.

2.Anon: Whey monograph. In: Anon: Micromedex Healthcare Series. Micromedex Inc, Englewood, CO; 2001.

3. Lothe L & Lindberg T: Cow's milk whey protein elicits symptoms of infantile colic in colicky formula-fed infants: A double-blind crossover study. Pediat 1989; 83(2):262-266.

4. Laoprasert N, Wallen ND, Jones RT et al: Anaphylaxis in a milk-allergic child following ingestion of lemon sorbet containing trace quantities of milk. J Food Protection 1998; 61(1):1522-1524.

5. Ellis MH, Short JA & Heiner DC: Anaphylaxis after ingestion of a recently introduced hydrolyzed whey protein formula. J Pediat 1991; 118(1):74-77.

Last Updated: 7/4/2018
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