Both viagra or Cialis are effective treatments for erectile dysfunction. Their mechanisms of action involve inhibiting PDE5 to increase blood flow to the penis. Cialis is known for its long-lasting effect, which lasts up to 36 hours, earning it the nickname "the weekend pill," while V*agra is effective for approximately 4 to 6 hours, requiring more careful planning of s*xual intercourse. Both drugs share common side effects, such as headache, hot flashes, and nausea, but also have specific side effects. They have similar contraindications and drug interactions, particularly with nitrates and other medications. Cialis and V*agra are available in generic form, which may be more affordable. They are widely available in pharmacies and online platforms.

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