|What are the possible side effects of
If you experience any of the following serious side effects, stop taking
fluoxetine and contact your doctor immediately or seek emergency medical
An allergic reaction (difficulty breathing; closing of the throat;
swelling of the lips, tongue, or face; or hives); an irregular heartbeat
or pulse; low blood pressure (dizziness, weakness); high blood pressure
(severe headache, blurred vision); chills or fever; unusual bleeding or
bruising; a rash or hives.
If you experience any of the following less serious side effects,
continue taking fluoxetine and talk to your doctor: headache, tremor,
nervousness, or anxiety; difficulty concentrating; nausea, diarrhea, dry
mouth, or changes in appetite or weight; weakness; increased sweating;
sleepiness or insomnia; or decreased sex drive, impotence, or difficulty
having an orgasm.
Side effects other than those listed here may also occur. Talk to your
doctor about any side effect that seems unusual or that is especially
What other drugs will affect fluoxetine?
Do not take fluoxetine if you have taken a monoamine oxidase inhibitor
(MAOI) such as isocarboxazid (Marplan), phenelzine (Nardil), or
tranylcypromine (Parnate) during the last 2 weeks. Serious, and
sometimes fatal, reactions have occurred when these medicines have been
used together. Also, do not take fluoxetine if you are taking
thioridazine (Mellaril). Dangerous, even fatal irregular heartbeats may
occur if these medicines are taken together. You must wait 5 weeks after
stopping fluoxetine before taking thioridazine (Mellaril).
Before taking fluoxetine, tell your doctor if you are taking any of the
following medicines: a benzodiazepine such as diazepam (Valium),
alprazolam (Xanax), chlordiazepoxide (Librium), clorazepate (Tranxene),
temazepam (Restoril), triazolam (Halcion), and others; a tricyclic
antidepressant such as amitriptyline (Elavil), imipramine (Tofranil),
doxepin (Sinequan), nortriptyline (Pamelor), and others; St. John's
wort; a phenothiazine such as chlorpromazine (Thorazine), fluphenazine
(Prolixin), mesoridazine (Serentil), perphenazine (Trilafon),
prochlorperazine (Compazine), and others; lithium (Lithobid, Eskalith,
others) or haloperidol (Haldol); almotriptan (Axert), frovatriptan
(Frova), sumatriptan (Imitrex), naratriptan (Amerge), rizatriptan
(Maxalt), or zolmitriptan (Zomig); carbamazepine (Tegretol) or phenytoin
(Dilantin); warfarin (Coumadin); or digoxin (Lanoxin).
You may not be able to take fluoxetine, or you may require a dosage
adjustment or special monitoring during treatment if you are taking any
of the medicines listed above.
Drugs other than those listed here may also interact with fluoxetine.
Talk to your doctor and pharmacist before taking any prescription or
over-the-counter medicines, including herbal products.