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Pharmaceuticals API List 2 >>
Paroxetine >>
Interaction
INTERACTION
Paroxetine CAS number 61869-08-7
All SSRIs, including paroxetine, should
not be taken with any of the monoamine oxidase inhibitor (MAOI) class of
antidepressants, for example, isocarboxazid (Marplan), phenelzine (Nardil),
tranylcypromine (Parnate), selegiline (Eldepryl, Carbex), and procarbazine (Matulane)
or other drugs that inhibit monoamine oxidase, for example, linezolid (Zyvox).
Such combinations may lead to confusion, high blood pressure, tremor,
hyperactivity, coma, and death. (A period of 14 days without treatment
should lapse when switching between paroxetine and MAOIs.) Similar reactions
occur when paroxetine is combined with other drugs [for example, tryptophan,
St. John's wort, meperidine (Demerol), tramadol (Ultram) that increase
serotonin in the brain.
Paroxetine may increase the effect of the blood thinner, warfarin (Coumadin),
leading to excessive bleeding. Therefore, warfarin therapy should be
monitored more frequently in patients who are also taking paroxetine.
Combining SSRIs such as paroxetine with aspirin, nonsteroidal
anti-inflammatory drugs or other drugs that affect bleeding may increase the
likelihood of upper gastrointestinal bleeding. Phenytoin (Dilantin) and
phenobarbital may decrease the amount of paroxetine in the body and possibly
reduce its effectiveness.
Certain medications taken with this product could result in serious, even
fatal, drug interactions. Avoid taking MAO inhibitors (e.g., furazolidone,
isocarboxazid, linezolid, moclobemide, phenelzine, procarbazine, selegiline,
tranylcypromine) within 2 weeks before or after treatment with this
medication. Consult your doctor or pharmacist for additional information.
This drug should not be used with the following medications because very
serious (possibly fatal) interactions may occur: astemizole, terfenadine,
thioridazine, weight loss drugs (e.g., sibutramine, phentermine). Ask your
doctor or pharmacist for more details. Before using this medication, tell
your doctor or pharmacist of all prescription and nonprescription/herbal
products you may use, especially of: antiarrhythmics (e.g., propafenone,
flecainide), cimetidine, clozapine, digoxin, herbal/natural products (e.g.,
melatonin, ayahuasca, St John's wort), lithium, nefazodone, procyclidine,
other drugs which can cause bleeding/bruising (e.g., thrombolytic drugs such
as TPA, anticoagulants such as heparin or warfarin, antiplatelet drugs
including NSAIDs such as ibuprofen), other SSRI antidepressants (e.g.,
citalopram, fluoxetine), theophylline, tramadol, trazodone, tricyclic
antidepressants (e.g., amitriptyline, nortriptyline), "triptan" migraine
drugs (e.g., sumatriptan, zolmitriptan), tryptophan, venlafaxine. Low-dose
aspirin (usually 81-325 mg per day) for heart attack or stroke prevention
should be continued unless your doctor instructs you otherwise. Aspirin is
similar to NSAID drugs, and can increase the risk of bleeding in combination
with this medication (see above). Discuss the risks and benefits with your
doctor. Tell your doctor if you take any drugs that cause drowsiness such
as: anti-anxiety drugs (e.g., diazepam), certain antihistamines (e.g.,
diphenhydramine), anti-seizure drugs (e.g., carbamazepine), medicine for
sleep, muscle relaxants, narcotic pain relievers (e.g., codeine),
psychiatric medicines (e.g., phenothiazines such as chlorpromazine),
sedatives, tranquilizers. Other drugs besides paroxetine which may affect
the heart rhythm (QTc prolongation in the EKG) include dofetilide, pimozide,
quinidine, sotalol, procainamide, and sparfloxacin among others. QTc
prolongation can infrequently result in serious (rarely fatal) irregular
heartbeats. Consult your doctor or pharmacist for details. Ask for
instructions about whether you need to stop any other QTc-prolonging drugs
you may be using in order to minimize the risk of this effect. Do not start
or stop any medicine without doctor or pharmacist approval.
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