In fact whales are able to take in much more usable oxygen than land animals and humans. One estimate states that a whale may be able to store and use up to 90% of the oxygen they inhale. Whales are also able to shut down non essential functions in order to maximize the efficiency of their oxygen usage. Depending on the whales species whales have been known to hold their breath anywhere from 5 minutes up all the way up to 90 minutes during deep dives. Due to their consistent conscious effort to control their breathing whales are referred to as conscious breathers.
Serious side effects have been reported with potassium chloride including: Hyperkalemia. Potassium chloride can lead to dangerously high levels of potassium, which could cause the heart to stop beating. Tell your doctor if you have a history of heart or kidney disease. Digestive tract injury. Potassium chloride can remain in the digestive system for too long, leading to injuries in the digestive tract (stomach, intestines).
While calcium channel blockers are not typically recommended in heart failure, amlodipine may be used if other medications are not sufficient for high blood pressure or heart related chest pain. Amlodipine is taken by mouth and has an effect for at least a day. Common side effects include: swelling, feeling tired, abdominal pain, and nausea. Serious side effects may include low blood pressure or a heart attack. It is unclear if use is safe during pregnancy or breastfeeding. Doses should be decreased in people with liver problems and those who are old. Amlodipine is a long acting calcium channel blocker of the dihydropyridine type.