Alprostadil is a prostaglandin and it is a reliable option for erectile dysfunction treatment.
Prostaglandins are organic chemical substances naturally synthesized
within the body and are involved in numerous bodily functions, including
the promotion of uterine contractions. Alprostadil is applied either as
self-injection or as a tiny intra urethral suppository and it can
produce erection in a similar way to selective enzyme inhibitors.
This medicine is an effective treatment for some men. It can be administered by:
• Injection into the erectile tissue of the penis (such as Caverject or Edex)
• A system that administers the drug in pellets placed in the urethra (MUSE system)
Alprostadil is not an appropriate choice for men with:
• Severe circulatory or nerve damage
• Bleeding abnormalities or men who are taking medications that thin the blood, such as heparin or warfarin
• Penile implants
Injected Alprostadil
Injected
alprostadil (Caverject, Edex) uses a very small needle that the man
injects into the erectile tissue of his penis. About 80% of men describe
the pain of administering the injection as very mild.
The drug should not be injected more than 3 times a week or more than once within a 24-hour period.
MUSE System
The MUSE system delivers alprostadil through the urethra. It works in the following way:
• The device is a thin plastic tube with a button at the top.
•
The man inserts the tube into his urethral opening right after
urination. (Urinating or urine leakage right after administration may
reduce the amount of medication.)
• He presses the button, which releases a pellet containing alprostadil.
•
The man rolls his penis between his hands for 10 - 30 seconds to evenly
distribute the drug. To avoid discomfort, the man should keep the penis
as straight as possible during administration.
• The man should
be upright, (sitting, standing or walking), for about 10 minutes after
administration. By that time, he should have achieved an erection that
lasts 30 - 60 minutes. (If a man lies on his back too soon after
administration, blood flow to the penis may decrease and the erection
may be lost.)
• The erection may continue after orgasm.
The MUSE system should not be used more than twice a day and is not appropriate for men with abnormal penis anatomy.
Side Effects of Most Alprostadil Methods
Certain
side effects are common to all methods of administration, although they
may differ in severity depending on how the drug is given:
• Pain and burning at the application site.
• Scarring of the penis (Peyronie's disease), which is most likely to occur with injections.
•
Sudden, low blood pressure. Symptoms include dizziness,
light headedness, and fainting. If these symptoms occur, the man should
lie down immediately with his legs raised.
• Priapism (prolonged erection). Possible with any method, but less chance with the MUSE
system than with injections. If priapism occurs, applying ice for
10-minute periods to the inner thigh may help reduce blood flow.
Erections that last 4 hours or longer require emergency care.
•
Women partners may experience vaginal burning or itching. The drug may
have toxic effects if it reaches the fetus in pregnant women, so men
should not use alprostadil for intercourse with pregnant women without
the use of a condom or other barrier contraceptive device.
• Other
side effects include minor bleeding or spotting, redness in the penis,
and aching in the testicles, legs, and area around the anus.
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