The following information is a summary about Propecia. It is not intended to replace a doctor's instructions.
What is finasteride?
Finasteride prevents the conversion of testosterone to dihydrotestosterone (DHT) in the
body. DHT is involved in the development of benign prostatic hyperplasia (BPH).
Finasteride is used to treat symptoms of benign prostatic hyperplasia (BPH) in men with
an enlarged prostate.
Finasteride may also be used for other purposes not listed in this medication guide.
What is the most important information I should know about finasteride?
Before taking finasteride, tell your doctor if you have ever had an allergic reaction to
this medication, or to a similar medicine called dutasteride (Avodart).
Finasteride should never be taken by a woman or a child. Finasteride can be absorbed through the skin, and women or children should not be permitted to
handle finasteride tablets.
Although finasteride is not for use by women, this medication can cause birth defects
if a woman is exposed to it during pregnancy. Finasteride tablets should not be
handled by a woman who is pregnant or who may become pregnant.
If a woman accidentally comes into contact with this medication from a broken or
crushed tablet, wash the area with soap and water right away.
Call your doctor at once if you notice any breast lumps, pain, nipple discharge, or
other breast changes. These may be signs of male breast cancer.
What should I discuss with my healthcare provider before taking finasteride?
Before taking finasteride, tell your doctor if you have ever had an allergic reaction to
this medication, or to a similar medicine called dutasteride (Avodart).
Also tell your doctor if you have:
- liver disease, or abnormal liver enzyme tests;
- prostate cancer;
- a bladder muscle disorder;
- stricture of your urethra; or
- if you are unable to urinate.
Finasteride should never be taken by a woman
or a child. Finasteride can be absorbed through the skin, and women or children should not be
permitted to handle finasteride tablets.
Although finasteride is not for use by women, this medication can cause birth defects
if a woman is exposed to it during pregnancy. Finasteride tablets should not be
handled by a woman who is pregnant or who may become pregnant.
If a woman accidentally comes into contact with this medication from a broken or
crushed tablet, wash the area with soap and water right away.
How should I take finasteride?
Take this medication exactly as prescribed by your doctor. Do not take it in larger
amounts or for longer than recommended. Follow the directions on your prescription label.
Take this medicine with a full glass of water.
Finasteride can be taken with or without food.
To be sure this medication is helping your condition, your blood will need to be tested on
a regular basis. Your doctor will also test your prostate specific antigen (PSA) to check for
prostate cancer. Do not miss any scheduled appointments.
It is important to use finasteride regularly to get the most benefit. Get your prescription
refilled before you run out of medicine completely.
Store this medication at room temperature away from moisture, heat, and light. Keep
the bottle tightly closed when not in use.
What happens if I miss a dose?
Take the missed dose as soon as you remember. If it is almost time for your next dose,
wait until then to take the medicine and skip the missed dose. Do not take extra
medicine to make up the missed dose.
What happens if I overdose?
Seek emergency medical attention if you think you have used too much of this
medicine. An overdose of finasteride is not expected to produce life-threatening symptoms.
What should I avoid while taking finasteride?
Follow your doctor's instructions about any restrictions on food, beverages, or activity
while you are using finasteride.
Avoid getting up too fast from a sitting or lying position, or you may feel dizzy. Get up
slowly and steady yourself to prevent a fall.
Finasteride side effects
Get emergency medical help if you have any of these signs of an allergic
reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you notice any breast lumps, pain, nipple discharge, or
other breast changes. These may be signs of male breast cancer.
Less serious side effects may include:
- feeling like you might pass out;
- swelling in your hands or feet;
- pain in the testicles;
- impotence, loss of interest in sex, or trouble having an orgasm;
- abnormal ejaculation;
- swelling or tenderness in your breasts;
- dizziness, weakness;
- headache;
- runny nose; or
- skin rash.
This is not a complete list of side effects and others may occur. Tell
your doctor about any unusual or bothersome side effect.
What other drugs will affect finasteride?
There may be other drugs that can interact with finasteride. Tell your doctor about all
your prescription and over-the-counter medications, vitamins, minerals, herbal products, and
drugs prescribed by other doctors. Do not start a new medication without telling your doctor.
Where can I get more information?
- Your pharmacist can provide more information about finasteride.
