'''cialis''' is a [[medication|drug]] used to treat male erectile dysfunction ([[impotence]]). In the [[United States]], cialis has [[Food and Drug Administration]] approval and became available in December, [[2003]] as the third pill after [[Sildenafil|Viagra]] and [[Vardenafil|Levitra]]. Due to its 36-hour effect it is also known as the "Weekend Pill". cialis == cialis at work== A 20 mg dose of cialis is comparable to a 100 mg dose of [[sildenafil]] (Viagra). cialis ==Chemical information== ==Side effects== cialis ==Drug interactions - organic nitrates== buy cheap viagra online Since people who have taken cialis within the past 48 hours cannot take organic nitrates to relieve angina (GTN Spray), these patients should seek immediate medical attention if they experience [[angina]]l chest pain [http://www.rxlist.com/cgi/generic3/cialis_wcp.htm]. ==Marketing== In the United States, [[Eli_Lilly_and_Company|Eli Lilly]] has a multiyear agreement
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In the [[United States]], cialis has [[Food and Drug Administration]] approval and became available in December, [[2003]] as the third pill after [[Sildenafil|Viagra]] and [[Vardenafil|Levitra]]. Due to its 36-hour effect it is also known as the "Weekend Pill".
cialis
== cialis at work==
A 20 mg dose of cialis is comparable to a 100 mg dose of [[sildenafil]] (Viagra).
cialis
==Chemical information==
==Side effects==
cialis
==Drug interactions - organic nitrates==
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Since people who have taken cialis within the past 48 hours cannot take organic nitrates to relieve angina (GTN Spray), these patients should seek immediate medical attention if they experience [[angina]]l chest pain [http://www.rxlist.com/cgi/generic3/cialis_wcp.htm].
==Marketing==
In the United States, [[Eli_Lilly_and_Company|Eli Lilly]] has a multiyear agreement ( ... )
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