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Hair loss occurs when hair is shed at a
faster-than-normal rate. The normal hair growth cycle involves an active
growing phase followed by a resting phase. Normally about 50 to 100
hairs are lost on average each day, but certain medications or other
stressors can cause the hair roots to prematurely enter the resting
phase. This can lead to noticeable thinning or bald patches on the scalp
or other areas of the body.
While there are many different types
of hair loss, the two main types that can be experienced as a side
effect of certain medications include:
- Telogen effluvium –
The most common form of temporary hair loss that can occur within two to
four months of taking a drug or after an illness or stressful event.
Hair roots are pushed to the resting state too soon, resulting in
handfuls of hair that may fall out, with an average of 100 to 150 hairs
- Anagen effluvium – Severe and sudden hair loss that
occurs within days or weeks of taking certain drugs (usually
chemotherapy drugs). Hair loss is more extensive and can include
eyebrows, eyelashes, and other areas of the body. Re-grown hair may not
be as thick
Patients who experience hair loss typically
notice an excess of hair in combs, brushes, in the shower, or on
pillows. Handfuls of hair may come out at one time, or the hair loss can
be more gradual. Sometimes hair loss can occur from more places than
just the scalp.
In order to determine the cause of excessive hair
loss, a patient’s medical history and family history will need to be
discussed with a doctor, and a physical examination with inspection of
hair may be necessary. Tests may be performed by a doctor to determine
the cause of the hair loss. Possible tests include:
test - Performed on scalp hair to determine the hair’s ability to fall
out and test hair strength.
- Skin scrapings – Tests for possible
- Scalp biopsy – Examines scalp tissue for
- Hormone tests – Determines if there is an
underlying hormone imbalance.
- Screening tests for diseases – Can
detect thyroid problems, diabetes, lupus, etc.
When hair loss occurs as a result of medications,
it may be difficult to pinpoint which drug is causing the hair loss if
multiple drugs are being taken. With a doctor’s approval, a patient may
need to stop taking their medications one at a time to check, but it can
take two to three months after stopping a medication before hair loss
Most cases of hair loss will improve once the
disease, condition, or medication is no longer present, unless the hair
loss is hereditary and caused by the natural aging process.
who wish to slow hair loss and encourage hair regrowth often take
medications such as finasteride (Propecia) or minoxidil (Rogaine).
There are many possible causes of hair loss. Hair
loss can be a side effect of certain medications that interfere with
the normal cycle of hair growth on the scalp or other areas of the body.
Medications that have been shown to cause hair loss include:
- Anti-clotting medications
- Arthritis medications
- Birth control pills
- Cholesterol medications
- Epilepsy drugs
- Hormone replacement therapy
anti-inflammatory drugs (NSAIDs)
- Thyroid medications
Other possible causes of hair loss include:
- Diseases such as diabetes and lupus
- Hereditary factors
changes, as occurs in pregnancy, childbirth, stopping or starting birth
control pills, menopause, or in people with thyroid problems
treatments including radiation or surgery
deficiencies such as inadequate protein or iron in the diet or extreme
- Physical or emotional shocks to the system such as
high fever, sudden or excessive weight loss, infections, emotional
stress following death of a loved one
| Папка: Lifestyle | Добавил: Пим (30.03.2011)