The appropriate dosage of vardenafil, or any medication, can vary depending on factors such as your medical history, any other medications you're taking, and any underlying health conditions. It's crucial to consult with a healthcare professional for personalized advice. https://en.wikipedia.org/wiki/Vardenafil

That said, typically, the starting dose of vardenafil for most adults is 10 mg taken orally, as needed, about 60 minutes before sexual activity. Your doctor may adjust the dose based on how well it works for you and any side effects you experience. The maximum recommended dose is 20 mg. However, always follow your doctor's instructions and never exceed the recommended dosage without their guidance.

Why is levitra so expensive 

There could be several reasons why Levitra, which contains vardenafil as its active ingredient, is expensive:

Brand Name: Levitra is a brand-name medication, and brand-name drugs tend to be more expensive than their generic counterparts. Brand-name drugs often involve costs associated with research, development, marketing, and patent protection.

Patent Protection: When a pharmaceutical company develops a new drug, they typically obtain patents to protect their investment in research and development. During the period of patent protection, the company has exclusive rights to sell the drug, allowing them to set higher prices.

Limited Competition: If there are few or no generic versions of Levitra available,

the lack of competition can contribute to higher prices for the brand-name medication.

Healthcare System: Pricing of medications can also be influenced by the healthcare system of the country you're in. Factors such as regulations, insurance coverage, and negotiation between pharmaceutical companies and healthcare providers can affect drug prices.

Manufacturing Costs: The manufacturing process for medications can be complex and involve expensive equipment and stringent quality control measures, which can contribute to higher costs.

Marketing and Distribution: Costs related to marketing, distribution, and sales of the medication can also contribute to its overall price.

However, it's worth noting that generic versions of vardenafil may be available at a lower cost once the patent protection for Levitra expires. Generic drugs typically become available once the patent on the brand-name drug expires, allowing other manufacturers to produce and sell generic versions at lower prices. If cost is a concern for you, it may be worth discussing generic alternatives with your healthcare provider. Additionally, some pharmaceutical companies offer patient assistance programs or discounts to help reduce the cost of brand-name medications for those who qualify.