Why doesn’t the U.S. have a generic version of Viagra and/or Cialis yet?
According to Wikipedia, Viagra's patent for treatment of erectile dysfunction in the US will expire in 2019. It was filed in 1994.
The Short Answer
According to Wikipedia, Viagra's patent for treatment of erectile dysfunction in the US will expire in 2019. It was filed in 1994.
Analysis
Key Concepts: According, wikipedia, viagra's
This explanation focuses on according, wikipedia, viagra's and spans 20 words across 2 sentences. At 72% below the average Biology explanation (72 words), the answer takes a direct, no-frills approach — sometimes the simplest explanation is the most effective.
What This Answer Covers
This is a focused, single-point answer that gets directly to the core of the question without detours.
How This Compares in Biology
Ranked #466 of 500 Biology questions by answer depth (top 94%). This is a brief primer — the answer is intentionally short. For questions with a single core mechanism, brevity can actually be a strength.
Frequently Asked Questions
Is there a simple explanation for why the u.s. have a generic version of viagra and/or cialis yet?
According to Wikipedia, Viagra's patent for treatment of erectile dysfunction in the US will expire in 2019. It was filed in 1994.
How detailed is this explanation compared to similar Biology questions?
This is a brief answer at 20 words, ranked #466 of 500 Biology questions by depth. The key concepts covered are according, wikipedia, viagra's.
What approach does this answer take to explain the u.s. have a generic version of viagra and/or cialis yet?
The explanation uses direct explanation across 20 words. It is categorized under Biology and addresses the question through 1 analytical lens.