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It seems like you're looking for information about Cialis. Here's a brief overview:

Cialis is a medication used to treat erectile dysfunction (ED) and benign prostatic hyperplasia (BPH). It belongs to a class of medications called phosphodiesterase type 5 (PDE5) inhibitors.

Here are some key points about Cialis:

1. How it works: Cialis works by increasing blood flow to the penis, allowing men to achieve and maintain an erection.
2. Dosage: The recommended starting dose is 10mg, taken as needed, up to once daily. The maximum recommended dose is 20mg.
3. Duration: The effects of Cialis can last for up to 36 hours.
4. Side effects: Common side effects include headache, flushing, and stuffy nose. More serious side effects are rare but can include priapism (prolonged erection), vision changes, and hearing loss.
5. Interactions: Cialis can interact with other medications, such as nitrates, alpha-blockers, and blood thinners. It's essential to inform your doctor about all medications you're taking before starting Cialis.
6. Prescription: Cialis is available by prescription only and should be used under the guidance of a healthcare professional.

If you have any specific questions or concerns about Cialis, feel free to ask!