USES:
Tadalafil is used to treat male sexual function problems (impotence
or erectile dysfunction) by blocking a certain enzyme (phosphodiesterase-PDE5)
in the body. In combination with sexual stimulation, tadalafil helps
blood flow into the penis to achieve and maintain an erection. This
drug is not indicated for use in women. Use of this drug does not protect
against sexually transmitted diseases (e.g., HIV, hepatitis B, gonorrhea,
syphilis). Practice "safe sex" such as using latex condoms.
Consult your doctor or pharmacist for more details.
HOW TO USE:
This drug is taken by mouth as needed, at least 30 minutes before
sexual activity with or without food; or use as directed by your doctor.
This medication's effect on sexual ability may last up to 36 hours.
Therefore, do not take more than once daily as needed. Avoid eating
grapefruit or drinking grapefruit juice while being treated with this
medication unless your doctor instructs you otherwise. Grapefruit juice
can increase the amount of certain medications in your bloodstream.
Consult your doctor or pharmacist for more details. The dosage is based
on your medical condition, response to therapy, and other medications
you may be taking (see also Drug Interactions section). Consult your
doctor or pharmacist for more details. Read the patient information
leaflet provided by your pharmacist and ask questions if any of the
information is unclear.
SIDE EFFECTS:
Headache, stomach upset, back pain, muscle pain, nasal stuffiness,
flushing, pain in arms or legs, dizziness, or vision changes may occur.
If any ofthese effects persist or worsen, notify your doctor or pharmacist
promptly. Sexual activity may put extra strain on your heart, especially
if you have heart problems. If you have heart problems or experience
any of the following serious side effects during sex, stop and tell
your doctor immediately of: severe dizziness, fainting, chest pain.
In the unlikely event you have a painful or prolonged erection (lasting
more than 4 hours), stop using this drug and seek immediate medical
attention or permanent problems could occur. A serious allergic reaction
to this drug is unlikely, but seek immediate medical attention if it
occurs. Symptoms of a serious allergic reaction include: rash, itching,
unusual swelling, severe dizziness, trouble breathing. If you notice
other effects not listed above, contact your doctor or pharmacist.
DRUG INTERACTIONS:
See also How To Use section for drug-food interactions. This drug
should not be used with the following medications because very serious
(possibly fatal) interactions may occur: certain alpha-blocker medication
(alfuzosin, doxazosin, prazosin, terazosin, or doses greater than 0.4mg
daily of tamsulosin), nitrates (e.g., nitroglycerin, isosorbide), nitroprusside
(or any "nitric oxide donor" drugs), recreational drugs called
"poppers" containing amyl or butyl nitrite. If you are currently
using any of these medications, tell your doctor or pharmacist before
starting tadalafil. Before using this medication, tell your doctor or
pharmacist of all prescription and nonprescription/herbal products you
may use, especially of: drugs that affect certain liver enzymes (CYP
3A4 substrates, inhibitors and inducers such as cimetidine, rifamycins,
St. John's wort, or certain anti-seizure drugs), high blood pressure
medicines, other medications for impotence. If you are taking ritonavir,
erythromycin, ketoconazole, or itraconazole (examples of potent inhibitors
of CYP 3A4), do not take more than a 10mg dose of tadalafil in a 72
hour period. For more details contact your doctor or pharmacist. Do
not start or stop any medicine without doctor or pharmacist approval.
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