Viagra vs Levitra |
- Viagra originally developed to treat angina sufferers was later
discovered to help the cause of erectile dysfunction. Levitra
is relatively a new revolutionary drug used to treat Erectile
Dysfunction also.
- Viagra works in about 30 minutes and lasts for at least 4 hours.
Peak levels of erection were reached in mean times of 30 minutes
and 36 minutes after taking Levitra. Levitra stayed active and
working in the system for an average of 12 hours in patients 65
years or older, and 9 and a half hours in younger participants.
Clinical studies have shown that Viagra has the ability to remain
in the system for up to 4 hours.
- When a man is sexually aroused, certain tissues in his penis
relax. This allows large amounts of blood to flow in, thus producing
an erection. Viagra helps by elevating the levels of the chemical
that causes the tissues to relax. Levitra acts in the same way
as Viagra, by blocking an enzyme called phosphodiesterase-5, or
PDE-5. This helps the smooth muscles in the penis to relax, which
effectively increases blood flow.
| DRUGS |
CIALIS |
LEVITRA |
UPRIMA |
VIAGRA |
| Manufacturer |
Lilly Icos |
Bayer |
Abbott Laboratories |
Pfizer |
| Date Introduced |
Feb 2003 |
April 2003 |
June 2001 |
March 1998 |
| Dosage |
5mg,10mg,20mg |
5mg, 10mg,20mg |
2mg,3mg |
50mg,100mg |
| Average Approx. Absorbtion
Rate |
20 Minutes |
40 Minutes |
20 Minutes |
40 Minutes |
| Duration Of Effectiveness |
36 Hours |
4 Hours |
4 Hours |
4 Hours |
| Reported
Side Effects |
Headache, Myalgia,
Dyspepsia, Back Pain |
Headache, Flushing, Dyspepsia,
Nasal Congestion |
Headache, Nausea, Dizziness |
Congestion, Diarrhea, Flushing, Headaches,
Urinary Tract Infection, Bluish Vision |
| Contraindications |
Any Nitrate-Based Medicine,
Angina, Hypertension, Hypotension |
Any Nitrate-Based Medicine |
Angina, Myocardial Infarction,
Anti-Hypertensive Nitrates |
Any Nitrate-Based Medicine |
- Viagra achieved a success rate of 60-80 per cent, depending
on the dosage, in trials. However, it doesn't always work first
time as claimed by some. Levitra, by comparison, works for 72-90
per cent of men the first time and goes on to work 95 per cent
of the time.
- Blue discoloration of vision (overlap with PDE-6 in the retina)
is seen only with Viagra (<0.5%), whereas headache, facial
flushing, and mild indigestion were observed with Levitra. Viagra
can cause some visual problems, including, an increased sensitivity
to light, blurred vision, or an inability to tell the difference
between blue and green.
- VIAGRA is available in the strength and pack of 50mg, 100mg
(4-8 comp.) / 100mg (30 tablets USA) whereas Levitra is available
in 5mg, 10mg and 20 mg. 4 or 8 comp.
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