Drugs and Supplements That Interact
with Cyclosporine
non-steroidal anti-inflammatory
drugs
antibiotics (erythromycin, clarithromycin, azithromycin,
doxycycline)
trimethoprim sulfamethoxazole
immunosuppressive drugs (tacrolimus, melphalan)
oral contraceptives
wararin
St. John's Wort
grapefruit, grapefruit juice
Side Effects
Cyclosporine suppresses the immune
system (immunosuppressant), and there are possible side
effects that are mainly related to immunosuppression.
In addition, kidney toxicity, high blood pressure and
potential interaction with other drugs are other risks.
Cyclosporine's risks and benefits should be carefully
considered before starting the treatment. Side effects
are usually reversible if treatment with cyclosporine
is stopped.
Common
Side Effects of Cyclosporine
abnormal functioning of the kidney
high blood pressure (hypertension)
tremor
headache
numbness, tingling
excessive growth of hair (hypertrichosis)
enlargement of the gums in the
mouth
nausea, abdominal pain
diarrhea
muscle pain
joint pain
increased blood potassium levels
increased blood plasma levels
of cholesterol, fats
increased risk of cancer
There are also some less common
but serious side effects that are important to recognize.
Many patients are concerned by the reported increased
risk of cancer with cyclosporine. For example, lymphoma
has been reported in some patients taking cyclosporine.
Lymphoma is most commonly seen in patients taking higher
doses of medication and has been reported in those who
are also on other immunosuppressant medications. It
is not clear if cyclosporine is entirely responsible
for the increased risk of lymphoma, as these other drugs
could also play a role. In addition, certain studies
have shown that patients with psoriasis may have an
increased risk of lymphoma in general.
An increased risk of skin cancers
has also been reported in patients taking cyclosporine,
many of whom might have received phototherapy prior
to using cyclosporine—thereby increasing the risk
of skin cancer. The most common types of skin cancers
in patients receiving cyclosporine therapy are squamous
cell carcinoma and basal cell carcinoma. Fortunately,
both these cancers are highly curable, particularly
when detected early. Consequently, if you notice a changing
area on your skin or an area that is non-healing, report
it to your doctor immediately so that the lesion can
be checked and, if necessary, removed. Although there
are reasons why a patient taking cyclosporines might
develop lymphoma, it is important to recognize that
medications which affect the immune system might play
a role in the development of such cancers.
What Tests or Follow-ups Are Required
While on Cyclosporine?
Your blood pressure will be measured
prior to starting cyclosporine, then regularly during
the initial and subsequent months of therapy. Blood
pressure will be carefully monitored because high blood
pressure is one of the side effects of this medication.
Blood tests measuring how your kidneys are working will
also be performed. This test works by measuring your
creatinine, a waste product found in urine. A 25 percent
increase from normal blood levels of creatinine can
indicate mild kidney damage. This is generally reversible
when dosing is decreased or cyclosporine therapy is
discontinued. In addition, other blood tests, such as
cholesterol and potassium, might be tested at the same
time as the kidney tests are taken. Before you start
on any other medications, consult your doctor.
Oral Retinoids
Retinoids are man-made (synthetic)
drugs derived from vitamin A. There are two types of
retinoids used in dermatology: isotretinoin and acitretin.
Isotretinoin contains an ingredient related to vitamin
A and is mainly used to treat acne. Acitretin is also
related to vitamin A but is prescribed by dermatologists
to treat psoriasis. Another type of retinoid that is
still in clinical research trials is oral tazarotene,
which is the systemic form of topical tazarotene used
occasionally for treating localized psoriasis.
Acitretin
Before you take acitretin
tell your doctor if you are:
pregnant or planning a pregnancy
taking vitamins or other supplements
containing vitamin A
sensitive to retinoids
allergic to any food or drugs
taking any other drugs
taking an antibiotic (particularly
tetracycline)
Acitretin is used to treat moderate
to severe psoriasis that has failed to respond to topical
therapies. It is particularly effective for erythrodermic,
palmoplantar and pustular psoriasis. When used to treat
severe plaque-type psoriasis, patients might experience
only a partial improvement, and it can take several
months to see any improvement. You might notice a temporary
worsening of your condition in the first month of use.
In this case, your dose of Acitretin might be increased
or used in combination with other treatments, such as
topical corticosteroids, calcipotriol or phototherapy.
How Does
Acitretin Work?
In psoriasis, the skin cell
turnover is accelerated from the normal 28 to 30 days
for a cell to mature from the basal layer to be shed,
to 3 to 4 days. Acitretin helps to slow that rapid growth
and, as a result, it reduces the scaling, redness and
thickness seen in the skin of certain psoriasis patients.
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