Cialis (tadalafil) facts. Cialis is the trade name for a drug called Tadalafil. Cialis is one of a class of drugs known as PDE-5 (Phosphodiesterase type 5) inhibitors. Cialis and the other PDE-5 inhibitors can help men with erectile dysfunction (male impotence) by enhancing the erectile response when a man is sexually stimulated. Aside from Cialis, the other drugs in this class are Viagra (Sildenafil) and Levitra (Vardenafil).
This section shows a full list of all the diseases and conditions listed as a possible cause of Excessive yawning in our database from various sources. 1  Aortic dissection. 2  Excessive daytime sleepiness. 3  Heart attack.  Sleep apnea.
Yawning commonly occurs either before or after sleep, which is why it is usually considered a sign of being tired. Yawning also occurs frequently in people who are doing boring or tedious things. There is also a social aspect to yawning. Yawning appears to be contagious among humans and other animals, and the contagiousness of a yawn is well documented but hardly understood.