Cialis (tadalafil) is intended for the needs of males that have trouble getting an erection that would be stable enough or maintaining it for long enough to have sex. You may need to be taking this medicine if you have been diagnosed with erectile dysfunction and are unable to get an erection or hold it for long enough. Erectile dysfunction affects millions of men in the world every year, and although this condition cannot be cured in most cases, it can be successfully treated. The choice of options you have when shopping for high quality Cialis online is immense. You can get Cialis with international delivery and spend a lot less money. It is also possible to get help of a professional online health care provider and learn more about any contraindications you have, as well as side effects you may experience. Cialis may cause a few mild side effects, although they occur in a small number of patients. The following side effects are possible: light-headedness, irregular heartbeat, chest pain, fainting, and nausea. However, in some rare cases you may also get serious side effects that you will have to discuss with a qualified professional. The following ones are to be discussed: dizziness, blurred vision, erection that lasts longer than 4 hours, ringing in ears, loss of hearing, hives, changes in color vision, chest pain, and rash.