Brand & Generic Names
Basic Information
- Habit forming? No
- Prescription needed? Yes
- Available as generic? No
- Drug class: Dihydrotestosterone inhibitor
Uses
- Treats non-cancerous enlargement of the prostate gland in men
(benign prostatic hypertrophy or BPH).
- Theoretically, may prevent the development of prostate cancer.
Dosage & Usage Information
How to take:
Tablets--Swallow with liquid. If you can't swallow whole, crumble
tablet and take with liquid or food.
When to take:
Once a day as directed, with or without meals.
If you forget a dose:
Take as soon as you remember up to 2 hours late. If more than 2 hours,
wait for next scheduled dose (don't double this dose).
What drug does:
Inhibits the enzyme needed for the conversion of testosterone to
dihydrotestosterone. Dihydrotesterone is required for the development
of benign prostatic hypertrophy.
Time lapse before drug works:
May require up to 6 months for full therapeutic effect.
Don't take with:
Any other medicine without consulting your doctor or pharmacist, especially non-prescription decongestants.
Overdose
SYMPTOMS:
None expected.
WHAT TO DO:
Overdose unlikely to threaten life.
Possible Adverse Reactions or Side Effects
Life-threatening:
Common:
Infrequent:
Decreased volume of
ejaculation.
Rare:
Impotence, decreased
libido.
Warnings & Precautions
Don't take if:
You are allergic to finasteride.
Before you start, consult your doctor:
- If you have not had a blood test to check for prostate cancer.
- If your wife is pregnant or may become pregnant.
- If you have a liver disorder.
- If you have reduced urinary flow.
- If you have large residual urinary volume.
Over age 60:
No special problems expected.
Pregnancy:
- Not recommended for women.
- Pregnant women should not handle the crushed tablets.
- Avoid exposure to mate's semen if he takes finasteride.
Breast-feeding:
Not recommended for women.
Infants & children:
Not recommended.
Prolonged use:
Talk to your doctor about the need for follow-up medical examinations
or laboratory studies to check the effectiveness of the treatment.
Skin & sunlight:
No special problems expected.
Driving, piloting or hazardous work:
No special problems expected.
Discontinuing:
Don't discontinue without medical advice.
Others:
- Advise any doctor or dentist whom you consult that you take this
medicine.
- May affect results of some medical tests.
- For those who respond well, the drug must be continued indefinitely.
Possible Interaction with Other Drugs
GENERIC NAME |
COMBINED EFFECT |
| |
------------------------- |
----------------------- |
Anticholinergics* |
Decreased finasteride effect. |
Bronchodilators, |
Decreased finasteride effect. |
| |
Bronchodilators, |
Decreased finasteride effect. |
| |
Ephedrine |
Decreased finasteride effect. |
Phenylpropanolamine |
Decreased finasteride effect. |
Pseudoephedrine |
Decreased finasteride effect. |
Possible Interaction with Other Substances
INTERACTS WITH |
COMBINED EFFECT |
--------------- |
--------------- |
Alcohol: |
No proven problems. |
| |
Beverages: |
No proven problems. |
| |
Cocaine: |
No proven problems. |
| |
Foods: |
No proven problems. |
| |
Marijuana: |
No proven problems. |
| |
Tobacco: |
No proven problems. |
|