Apcalis SX works for long duration in quick time as it stays in your system for up to 36 hours. When a man is sexually excited, his body normally reacts by increasing the blood flow to his penis. This results into an erection. ED occurs when the blood flow to the penis is diminished or lessened, this can be caused by a number of medical conditions. After Apcalis SX Tadalafil is taken, your body starts responding within 30 minutes to an hourmaking it easier to achieve an erection. Apcalis SX will remain active within your body for following 36 hours, so achieving and maintaining an erection within this period will be easy._x000D__x000D_ Apcalis SX has proven to improve erectile function in most men, even when men suffer with mild, moderate or severe erectile dysfunction. Apcalis SX has shown great promise with satisfactory results under clinical trials. Apcalis SX helps to boost your confidence by improving your ability with power to maintain hard and strong erection, which will give you the ultimate satisfaction during sexual intercourse. Apcalis SX allows you to respond to your partner at the right moment._x000D__x000D_ _x000D__x000D_ Apcalis comes under a group of medicines called phosphodiesterase type 5 inhibitors. After the stimulation, it works by helping the blood vessels in male reproductive organ to relax, allowing the flow of blood into male reproductive organ. It is important to note that this drug does not work if there is no urge for love-making. It improves the production of the enzyme cGMP that promotes the blood supply to the male reproductive organ and helps the man to attain stiff form of male reproductive organ. As the male reproductive organ gets rigid, the veins and arteries in it become hard and robust thus, reducing the blood supply out of it._x000D__x000D_ As a result men are able to hold on the stiffness of male reproductive organ for longer time. Its dosage shows the effect for such a long time because only 10% of the drug is being utilized during every love-making activity and the total amount of apcalis 20mg is thrown out of the body after 36 hours._x000D__x000D_ _x000D__x000D_ Tadalafil is a drug used to treat male erectile dysfunction (impotence). It was developed by the biotechnology firm ICOS and marketed worldwide by Eli Lilly and Company under the brand name Cialis._x000D__x000D_ _x000D__x000D_ In the United States, tadalafil has Food and Drug Administration approval and became available in December, 2003 as the third impotence pill after sildenafil (Viagra) and vardenafil (Levitra). Due to its 36-hour effect it is also known as the weekend pill. It should be noted that the drug has not been formally studied in regard to multiple sexual attempts during a 36 hour period._x000D__x000D_ _x000D__x000D_ Tadalafil is also currently undergoing Phase III clinical trials for the treatment of pulmonary hypertension._x000D__x000D_ Side Effects_x000D__x000D_ There are always side effects that go with Apcalis SX, just as there are with any medication. These side effects are best discussed with your doctor, so that they can guide you on the best course of action. They can also assist you when it comes to pairing Apcalis SX with any other medications that you are taking. You must always be careful with different medications, as an unsafe mix can lead to illness, and in worse cases death._x000D__x000D_ Here is the list of side effects that you can experience when using Apcalis SX:_x000D__x000D_ Headache_x000D__x000D_ Nausea_x000D__x000D_ Dizziness_x000D__x000D_ Gastrointestinal Discomfort_x000D__x000D_ Back pain_x000D__x000D_ Muscle aches, and stiffness_x000D__x000D_ Flushing of skin_x000D__x000D_ If you find that you are experiencing any additional side effects or if you have any severe reactions to this medication please discontinue use, and seek medical attention.