While vitamin K deficiencies are uncommon, you may be at higher risk if you: Have a disease that affects absorption in the digestive tract, such as Crohn's disease or active celiac disease Take drugs that interfere with vitamin K absorption
The most common side effects with CIALIS are:headache, indigestion, back pain, muscle aches, flushing, and stuffy or runny nose. These side effects usually go away after a few hours. Men who get. back pain and muscle aches usually get it 12to 24hours after taking CIALIS.
The amount of time CIALIS takes to work varies from person to person. In some men CIALIS can work as early as 16 minutes after taking the tablet but it is recommended that you allow 1 hour the first time you take it. CIALIS has been proven to be effective for up to 36 hours.