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Drugs
That Interact with Methotrexate
trimethoprim sulfamethoxazole
non-steroidal anti-inflammatories
drugs (NSAIDs)
barbiturates (depressants such
as pentobarbital sodium)
triamterene (diuretic)
pyrimethamine (anti-protozoa
drug)
aspirin
penicillin
Side
Effects
There are side effects that can
develop right away (acute or short-term side effects)
or that might appear after a longer period of time (chronic
or long-term side effects). If you do experience any
side effects, be sure to tell your doctor.
What Tests and Follow-ups Are Required
While Taking Methotrexate?
Once methotrexate is started,
regular follow-up visits are necessary so your doctor
can properly monitor both your health and response to
treatment. The results of monitoring and testing enable
your doctor to modify your dosage in case you need to
increase it to improve the results, decrease it to reduce
any side effects or discontinue it altogether.
Cyclosporine
Cyclosporine is a pill given to
patients with moderate to severe psoriasis. Initially
discovered in 1976, and used as an immune suppressing
drug for organ transplant patients, cyclosporine was
observed to also have a beneficial effect on a series
of patients who had psoriasis but who were taking the
drug for an unrelated disease.
How Does
Cyclosporine Work?
Cyclosporine is prescribed for
the treatment of severe, resistant, plaque-type psoriasis.
Many patients will use cyclosporine after they have
failed topical therapies (creams and ointments), ultraviolet
therapy (phototherapy) or other oral medications (methotrexate,
retinoids). Cyclosporine works by inhibiting the activation
of the T lymphocyte, which is one of the key immune
cells responsible for the development of psoriasis.
It is highly effective in treating psoriasis, and works
rapidly.
Patients Who May Benefit from Cyclosporine
those with moderate to severe
psoriasis who have failed to respond to phototherapy,
or other
systemic or biologic therapies
those needing treatment for a
psoriasis flare
those who cannot tolerate or
have contraindications to other systemic treatments.
How Do You Take Cyclosporine?
The medication is generally taken
by mouth once daily and the dosage is based on your
weight. The starting dose can begin at 2.5 mg per kilogram
of body weight per day, and can be increased to 5 mg/kg/day.
For example, in a patient weighing 60 kg (132 pounds),
a starting dose could be 150 mg per day. The medication
is taken daily and it is important not to miss any doses.
If you miss a dose, take it as soon as possible.
Before taking cyclosporine, make
sure you read the prescription label carefully. Also
be sure to take the exact amount of medicine prescribed
by your doctor. Your dose depends on several factors,
including the type of psoriasis you have. Your doctor
may change your prescribed dose, so it is important
to check the label every time you fill your prescription.
Cyclosporine works quite quickly
to improve psoriasis compared to methotrexate and retinoids.
You could begin to experience improvement in the first
few weeks of treatment and, within the first four to
eight weeks, the clearing of large areas of psoriasis
is not uncommon. However, once treatment with cyclosporine
is discontinued, psoriasis will, in all likelihood,
recur over several weeks to months. For this reason,
it is important that the medication not be stopped abruptly,
as psoriasis can flare quickly. Before you stop taking
this medication, discuss this step with your doctor
as s/he will want to either taper the medication by
gradually decreasing the dosage or substitute another
treatment. It is also important to understand that cyclosporine
is usually discontinued after a year as it can cause
kidney damage.
Is Cyclosporine Right for You?
Before beginning treatment with
cyclosporine, your doctor will ask you several questions,
examine you and then discuss the possible treatments
and their side effects. If you and your doctor decide
cyclosporine is a good choice for you, some tests will
be performed, including a careful skin and physical
examination, a test of your kidney function and a complete
blood cell count. In addition, your blood pressure will
be measured prior to starting the medication and regularly
thereafter.
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