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Generic Cialis 20 mg or Tadalafil is an erectile dysfunction drug used to treat male impotence.  Generic Cialis (Tadalafil) is also known as “The Weekend Pill” since its effectiveness lasts about 36 hours. The erectile  dysfunction drug is recognized for its multiple and long lasting effects such as attaining and maintaining an erection, feeling greater frequency of orgasms and experiencing better satisfaction of the sexual intercourse. Generic Cialis (Tadalafil) is the 3rd erectile dysfunction drug approved by FDA. 
 
Generic Cialis (Tadalafil) mechanism of action consists in inhibiting phosphodiesterase type 5 PDE5 and increasing blood flow in the penis, thus, improving erection. 
 
Administration guidelines. Generic Cialis 20 mg (Tadalafil) should be taken orally 30 minutes prior to the sexual intercourse. Generic Cialis (Tadalafil) is available in tablets of 5mg, 10mg and 20 mg. It is recommended to take the Erectile Dysfunction drug starting with the smallest dose and constantly increase it if necessary based on individual tolerability and efficiency. 
Side effects of Generic Cialis (Tadalafil) may include headaches, back pain, nasal congestion, indigestion, muscle pain and facial flushing. To avoid side effects, you are strongly advised to consult a doctor prior to taking Cialis (Tadalafil). 
Generic Cialis (Tadalafil) is contraindicated in men suffering from cardiovascular disease who are taking organic nitrate and alpha-adrenergic antagonists.
 
Important to notice: Generic Cialis 20 mg (Tadalafil) may be taken 30 minutes prior to the sexual act regardless to food.  This impotence medication does not protect against sexually transmitted diseases. You are strongly advised to opt for safe sex to prevent HIV/Aids infections. It is recommended to store the tablets at a temperature between 15-25 C.