Levitra (vardenafil) and Viagra (sildenafil) are both PDE5 inhibitors approved by the FDA for erectile dysfunction — but they are not identical. Understanding the differences can help you choose the medication that best fits your body, lifestyle, and any health conditions you may have.
What is Levitra (Vardenafil)?
Levitra contains vardenafil hydrochloride and was FDA-approved in 2003 — five years after Viagra. It comes in 5mg, 10mg, and 20mg tablets. Like Viagra, it inhibits PDE5 to promote blood flow to the penis during sexual arousal. However, vardenafil has a slightly different molecular structure that may give it some distinct advantages, particularly for certain patient groups.
The Mayo Clinic notes that vardenafil is one of the most selective PDE5 inhibitors available, meaning it has less off-target activity on other PDE enzymes, which may reduce certain side effects.
Levitra vs Viagra: Head-to-Head Comparison
| Feature | Levitra (Vardenafil) | Viagra (Sildenafil) |
|---|---|---|
| Active Ingredient | Vardenafil | Sildenafil Citrate |
| FDA Approved | 2003 | 1998 |
| Onset Time | 25–60 minutes | 30–60 minutes |
| Duration | 4–6 hours (up to 8 in some men) | 4–6 hours |
| Available Doses | 5mg, 10mg, 20mg | 25mg, 50mg, 100mg |
| Effect of High-Fat Meals | Minimal impact | Delays absorption by 30–60 min |
| Vision Side Effects | Less common | More common (bluish tinge) |
| Effective in Diabetic Men | Slightly better evidence | Good evidence |
| Generic Available | Yes, but fewer options | Yes, widely available |
Onset and Duration
Both medications work within a similar timeframe — usually 30 to 60 minutes after taking the tablet. Some men find Levitra kicks in slightly faster, but this varies significantly between individuals. Duration is also similar: both typically last 4–6 hours, though some men report Levitra lasting slightly longer.
If you want faster onset, Spedra (avanafil) is currently the fastest-acting ED medication at 15–30 minutes. For longer duration, Cialis (tadalafil) remains the clear winner at up to 36 hours.
Food Interactions
This is one area where Levitra has a practical advantage. Viagra's absorption is delayed significantly by high-fat meals — eating a burger or steak before sex can push back the onset by 30–60 minutes. Levitra, by contrast, is much less affected by food. You can take it after a normal meal without worrying about timing as carefully.
This makes Levitra a popular choice for men who want to take their medication over dinner without losing effectiveness. For more on Viagra and food timing, see our guide on whether to take Viagra on an empty stomach.
Which Works Better for Men with Diabetes?
Erectile dysfunction is significantly more common in men with diabetes — up to 3 times more likely, according to the American Diabetes Association. Several clinical studies have found that Levitra may be slightly more effective in diabetic men compared to Viagra, possibly due to its higher selectivity for PDE5. However, both are considered effective and approved for this use. For more on this topic, see our article on ED and diabetes.
Side Effects Comparison
Both medications share common side effects: headache, flushing, nasal congestion, and indigestion. However, there are some differences:
- Vision changes (blue-tinged vision, light sensitivity) are more commonly associated with Viagra due to sildenafil's slight effect on PDE6 in the retina
- Back pain and muscle aches are more associated with Cialis (tadalafil), not typically with Levitra or Viagra
- Levitra may cause slightly less visual disturbance, making it preferable for men who have experienced this with Viagra
According to WebMD, both medications are well-tolerated in the majority of men with ED.
Who Should Choose Levitra?
- Men with diabetes who have had limited success with Viagra
- Men who frequently eat before taking their ED medication
- Men who have experienced visual side effects on Viagra
- Men who want a slightly more selective PDE5 inhibitor
Who Should Choose Viagra?
- Men who want the most widely available and researched ED medication
- Men looking for the most affordable generic option (generic sildenafil is extremely cost-effective)
- First-time users who want a well-established, reliable choice
Browse Our Full Range of ED Medications
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View Levitra View Viagra Free ConsultationConclusion
Levitra and Viagra are both effective, well-tolerated ED treatments. For most men, either will work well. Levitra has an edge for men who eat before taking their medication or who have diabetes. Viagra benefits from a wider selection of generics and a longer track record. The best approach is to try one, assess how your body responds, and consult your doctor if you need to switch.
You can also compare all available options in our full guide: Cialis vs Viagra: Which is Right for You?
