Methotrexate
THIS INFORMATION SUPPLEMENTS INFORMATION GIVEN TO YOU
ELSEWHERE. AS
A PATIENT YOU MUST UNDERSTAND THE REASONS YOU ARE TAKING THE
DRUG
AND HAVE SOME KNOWLEDGE OF THE BENEFITS AND RISKS.
YOUR OWN
DEPARTMENT WILL PROBABLY PROVIDE SIMILAR GUIDELINES AND YOU
SHOULD ADHERE TO
THE PRACTICE AND POLICIES OF YOUR OWN
RHEUMATOLOGY
DEPARTMENT
What do the tablets look like?
Methotrexate tablets are usually yellow, but
the colour may vary depending on
which brand your chemist is able to obtain.
The tablets should all be of 2.5mg
strength - please check
this.
Why are you taking
Methotrexate?
Methotrexate belongs to the group
of medicine known as disease modifying or
second line agents used to treat
inflammatory joint disease.
As Methotrexate is not a pain reliever you will
not notice an immediate benefit. It
may take up to 3 months to notice an
improvement in your symptoms. You will
need to carry on taking your other
medication as well.
Methotrexate requires careful monitoring to avoid
toxicity (side effects).
How to take
Methotrexate
You will usually start on a once
weekly dose of between 5mg and 10mg. Choose a
day that is best for you to
take your treatment and keep to that routine. The dose
may be increased
depending on how your symptoms respond to the treatment. You
will be
prescribed folic acid tablets. One tablet should be taken every day except
on the day you take Methotrexate.
What to do if you miss a dose
If you
forget to take your medication, do not double your next dose but make a
note
of it and remember to tell your doctor at your next appointment. If you
forget on your regular Methotrexate day, it is fine to take your
Methotrexate
tablets a day or two later.
Can you take other medicines and alcohol?
Alcohol can interact with Methotrexate and damage your liver.
If you take alcohol,
it is advised that you drink only 1 unit per day and
that you discuss this with
Rheumatology Team.
Methotrexate interacts
with a number of other medicines. Always tell your doctor
you are taking
Methotrexate before any other medicines are prescribed for you,
especially
the following:
· Probencid
· Trimethoprim
· Co-trimoxazole (brand name
Septrin, Bactrim)
You should not take any additional medicines without
checking first with your
doctor.
You should avoid buying medicines over
the counter as Methotrexate interacts
with a number of other medications,
but if you do so please tell the pharmacist
you are taking Methotrexate.
Your doctor may prescribe aspirin or non-steroidal
anti-inflammatory drugs,
or you may already be taking them. These may interact
with Methotrexate,
however it is unlikely to cause a problem at the doses
prescribed for
you.
Paracetamol, coproxomol or codeine can be taken with
Methotrexate.
Contraception and
pregnancy
Treatment with Methotrexate has the
potential to affect fertility of men and
women. It is advised that you
should not be taking Methotrexate before
conception or for at least six
months after treatment. Treatment with
Methotrexate has the potential to
affect the development of the unborn child and
men and women of childbearing
age should use a reliable method of contraception
to avoid the risk of an
unplanned pregnancy during treatment. When planning a
pregnancy, it is
important that both men and women on this drug discuss
medication with the
Rheumatology Team. This should be at least six months
before
conception.
Special
precautions
Your doctor will arrange for you to
have regular blood tests, two weekly for the
next three months, then every
month thereafter.
All infections should be treated promptly. If you are aware
of an infection, arrange
to see your doctor.
Possible side effects
"
Nausea, upset stomach
Take the tablets with or after food, if possible in the
evening, to reduce any
stomach upset. Drink plenty of water with the
tablets. The feeling of sickness
usually goes away after a time as your body
gets used to the treatment. If the
sickness is severe, consult your
doctor.
" Mouth ulcers, sore throat or mouth
" Rash, itching anywhere on
the body
" Effects on the bone marrow or the liver
Regular blood tests are
carried out to monitor for this.
" Inflammation of the lung tissue
A chest
x-ray is taken before starting treatment. If you find yourself becoming
increasingly breathless, report it to your doctor immediately.
" Thinning
hair
" Reduced resistance to infection
You should avoid close contact with
people who have infections such as
chickenpox. If you know you have been in
close contact with somebody with
chickenpox, contact your doctor for advice.
Do not have any live vaccinations
without first discussing it with your
doctor.
If you have noticed any side effects, tell the doctor or nurse
promptly.
Please note: the information here
is additional information for you. Please also
read the information sheet
that is provided with your medication