Cialis is an oral erectile dysfunction drug that treats the ED (erectile dysfunction) by increasing the blood inflow to the penile tissues. The usage of Cialis is effective for around 36 hours from the start of its intake whereas, the effectiveness of other drugs stays for at the most 12 hours. The manufacturer and marketer of Cialis are Lily ICOS LLC. To start the dosage of the drug one needs to have a prescription. Such a prescription can be from a doctor or an online source. A prescription that a patient avails from online sources is known as an online prescription. The online prescriptions of 시알리스 are available free of cost from various online sources. Cialis is a drug prescribed for males only. Under no circumstances, it should be given to individuals of other sex or to a child. It can cause an unexpected loss in blood pressure to a dangerous point if it is taken with certain kinds of other drugs. Hence, consultation with a doctor is needed if a patient is taking drugs for treating other diseases. This drug cannot increase male sexual desire, cannot protect him from sexually transmitted diseases, and cannot serve as a birth control pill. Individuals with a medical history of heart ailments, diabetes, strokes, hypertension, and allergy should also seek proper medical guidance from a doctor before starting its dosage. The drug is an ED treatment pill that only helps in retaining penile stiffness during sex thus one needs natural sexual excitement to see its effects. Before a patient with ED orders and buys it, he should seek various information on how it works, precautions a patient should take, and side effects of the Cialis. Other than these, a patient can also seek information from other sources like online forums and reviews. This extra information helps a patient get to know more about Cialis and let him decide whether to get a Cialis prescription or not. Order and buy your dosage of Cialis only after gathering all this information. While millions of ED patients are choosing this drug over other ED treatment pills now it is time to start to dosage to see whether it benefits you or not.