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ED Trial Pack contains Generic Viagra (Sildenafil Citrate), Generic Cialis (Tadalafil) and Generic Levitra (Vardenafil), the best Erectile Dysfunction drugs approved by FDA. The potency drugs belong to a group of drugs called phosphodiesterase inhibitors.   
 
ED Trial Pack mechanism of action consists in preventing the enzyme PDE5 from working, thus allowing blood flow into the penis. The outcome is a strong erection during the sexual act. The effectiveness of the drugs is different; please check Generic Viagra (Sildenafil Citrate), Generic Cialis (Tadalafil) and Generic Levitra (Vardenafil) to see how each of them work.
 
Administration guidelines. Generic Viagra (Sildenafil Citrate), Generic Cialis (Tadalafil) and Generic Levitra (Vardenafil) should never be taken simultaneously. It is important to take a 24-48 hour break between each dose. The Erectile Dysfunction Drugs should be administered 30-60 minutes prior the sexual intercourse. For more accurate information, please view the administration guidelines for Generic Viagra (Sildenafil Citrate), Generic Cialis (Tadalafil) and Generic Levitra (Vardenafil).
 
ED drugs site effects mostly include headache, stuffy nose, facial flushing, nausea and a prolonged erection lasting for more than 4 hours. However, side effects may vary, please check the specific side effects for Generic Viagra (Sildenafil Citrate), Generic Cialis (Tadalafil) and Generic Levitra (Vardenafil). (backlinks). If you suspect any of the indicated symptoms you are advised to immediately seek medical attention. 
 
Erectile Dysfunction drugs are contraindicated in men who take nitrates and to those with hypersensitivity to the active substance of the specific drug. Prior to taking any ED drug, please get acquainted with the contraindications of Generic Viagra (Sildenafil Citrate), Generic Cialis (Tadalafil) and Generic Levitra (Vardenafil).
 
Important to notice: Generic Viagra (Sildenafil Citrate), Generic Cialis (Tadalafil) and Generic Levitra (Vardenafil) do not protect against sexually transmitted diseases and HIV. Considering that Generic Viagra (Sildenafil Citrate), Generic Cialis (Tadalafil) and Generic Levitra (Vardenafil) are not aphrodisiacs, the effectiveness of these Erectile Dysfunction drugs depend on the sexual stimulation. Elder men are recommended to consult a doctor prior to taking any of the ED drugs. Alcohol and grapefruit juice should not be mixed with any of the Erectile Dysfunction medicines as to avoid lower blood pressure.