What are the differences between oral medications for erectile dysfunction, such as Viagra, Cialis, and Levitra?

Viagra (sildenafil), Cialis (tadalafil), and Levitra (vardenafil) are all oral medications used to treat erectile dysfunction (ED). While they belong to the same class of medications known as phosphodiesterase type 5 (PDE5) inhibitors and share similar mechanisms of action, there are some differences in terms of onset of action, duration of effectiveness, and potential side effects. Here’s a comparison of these three medications:

1. Viagra (Sildenafil):

• Onset of Action: Typically takes effect within 30 minutes to an hour after ingestion.
• Duration of Effect: Generally remains effective for about 4 to 6 hours.
• Flexibility: It’s recommended to take Viagra on an empty stomach for optimal absorption, but it can be taken with or without food.
• Dosage Options: Available in different dosage strengths (25 mg, 50 mg, and 100 mg).
• Side Effects: Similar to other PDE5 inhibitors, common side effects include headaches, flushing, indigestion, nasal congestion, and vision changes.

2. Cialis (Tadalafil):

• Onset of Action: Takes effect within about 30 minutes to 2 hours after ingestion.
• Duration of Effect: Known for its longer duration of effectiveness, with some formulations remaining effective for up to 36 hours. There’s also a daily dose option (Cialis Daily) that can be taken once a day.
• Flexibility: Can be taken with or without food.
• Dosage Options: Available in different dosage strengths (2.5 mg, 5 mg, 10 mg, and 20 mg for as-needed use; 2.5 mg and 5 mg for daily use).
• Side Effects: Common side effects are similar to other PDE5 inhibitors, but due to its longer duration, some users might experience side effects for a longer period.

3. Levitra (Vardenafil):

• Onset of Action: Typically takes effect within 30 minutes to an hour after ingestion.
• Duration of Effect: Generally remains effective for about 4 to 5 hours.
• Flexibility: Can be taken with or without food, though high-fat meals might delay the onset of action.
• Dosage Options: Available in different dosage strengths (5 mg, 10 mg, and 20 mg).
• Side Effects: Common side effects are similar to those of other PDE5 inhibitors.