Uses
Mefenamic
acid is used for the short-term treatment of mild to moderate pain from
various conditions. It is also used to decrease pain and blood loss
from menstrual periods.
Mefenamic
acid is known as a nonsteroidal anti-inflammatory drug (NSAID).
Side Effects
Upset
stomach, nausea, heartburn, dizziness, drowsiness, diarrhea,
and headache may occur. If any of these effects persist or worsen, notify
your doctor or pharmacist promptly.
Remember
that your doctor has prescribed this medication because he or she has
judged that the benefit to you is greater than the risk of side effects. Many
people using this medication do not have serious side effects.
This
medication may raise your blood pressure. Check your blood pressure
regularly and tell your doctor if the results are high.
Tell
your doctor right away if any of these unlikely but serious side effects
occur: fainting, persistent/severe headache, hearing changes (e.g., ringing
in the ears), fast/pounding heartbeat, mental/mood changes, stomach pain,
difficult/painful swallowing, vision changes, symptoms of heart
failure (such as swelling ankles/feet, unusual tiredness, unusual/sudden
weight gain).
Stop
taking mefenamic acid and tell your doctor right away if any of these
rare but very serious side effects occur: easy bruising/bleeding, signs of
infection (e.g., fever, persistent sore throat), unexplained stiff
neck, change in the amount/color of urine.
This
drug may rarely cause serious, possibly fatal liver disease. If you notice
any of the following rare but very serious side effects, stop taking mefenamic
acid and consult your doctor or pharmacist right away: persistent nausea/vomiting,
severe stomach/abdominal pain, weakness, dark urine,
yellowing eyes/skin.
A
very serious allergic reaction to this drug is rare. However, get
medical help right away if you notice any symptoms of a serious allergic
reaction, including: rash, itching/swelling (especially of the face/tongue/throat),
severe dizziness, trouble breathing.
This
is not a complete list of possible side effects. If you notice other effects
not listed above, contact your doctor or pharmacist.
Precautions
Before
taking mefenamic acid, tell your doctor or pharmacist if you are
allergic to it; or to aspirin or other NSAIDs (e.g., ibuprofen, naproxen, celecoxib);
or if you have any other allergies. This product may contain inactive
ingredients, which can cause allergic reactions or other problems. Talk to your
pharmacist for more details.
This medication should
not be used if you have certain medical conditions. Before using this medicine,
consult your doctor or pharmacist if you have: aspirin-sensitive asthma (a
history of worsening breathing with runny/stuffy nose after taking aspirin or
other NSAIDs, severe kidney disease, recent heart bypass surgery (CABG),
active bleeding/sores in stomach/intestines (ulcer, gastrointestinal
bleeding).
Before
using this medication, tell your doctor or pharmacist your medical history,
especially of: asthma, bleeding/clotting problems, blood disorders (e.g., anemia), high
blood pressure, diabetes, heart disease (e.g., history of heart
attack), liver disease, growths in the nose (nasal polyps), obesity, tobacco use,
history of stomach/intestine/esophagus problems (e.g., bleeding,
ulcers, recurring heartburn), stroke, swelling of the ankles/feet/hands.
Kidney problems
can sometimes occur with the use of NSAID medications, including mefenamic
acid. Problems are more likely to occur if you are dehydrated, have heart
failure or kidney disease, are an older adult, or if you take certain
medications (see also Drug Interactions section). Drink plenty of
fluids as directed by your doctor to prevent dehydration and tell
your doctor right away if you have a change in the amount of urine.
Before
having surgery, tell your doctor or dentist that you are using this
medication.
This
drug may make you dizzy or drowsy. Alcohol or marijuana (cannabis)
can make you more dizzy or drowsy. Do not drive, use machinery, or do anything
that needs alertness until you can do it safely. Avoid alcoholic beverages.
Talk to your doctor if you are using marijuana (cannabis).
This
medicine may cause stomach bleeding. Daily use of alcohol and tobacco,
especially when combined with this medicine, may increase your risk for stomach
bleeding. Limit alcohol and stop smoking. Consult your doctor or pharmacist
for more information.
This
medication may make you more sensitive to the sun. Limit your time in the sun.
Avoid tanning booths and sunlamps. Use sunscreen and wear protective
clothing when outdoors. Tell your doctor right away if you get sunburned or
have skin blisters/redness.
Kidney
function declines as you grow older. This medication is removed by the kidneys.
Therefore, caution is advised when using this drug in the elderly because they
may be more sensitive to its side effects, especially stomach bleeding and
kidney problems.
Before
using this medication, women of childbearing age should talk with their
doctor(s) about the benefits and risks (such as miscarriage, trouble getting
pregnant). Tell your doctor if you are pregnant or if you plan to
become pregnant. During pregnancy, this medication should be used only
when clearly needed. It is not recommended for use during the first and last
trimesters of pregnancy due to possible harm to the unborn baby and
interference with normal labor/delivery.
This
drug passes into breast milk and may have undesirable effects on a
nursing infant. Consult your doctor before breast-feeding.
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