I found this info on the effects of botox on breathing. It explains why I have been having breathing difficulties, especially at night, resulting in day fatigue and weakness. I have never had breathing difficulties prior to having botox. It coulf have to do with the large dose that was injected.
http://botoxjuvedermdoctor.com/botox/safety-information/BOTOX may cause serious side effects that can be life threatening. Call your doctor or get medical help right away if you have any of these problems any time (hours to weeks) after injection of BOTOX:
Problems swallowing, speaking, or breathing. These problems can happen hours to weeks after an injection of BOTOX® or BOTOX® Cosmetic usually because the muscles that you use to breathe and swallow can become weak after the injection. Death can happen as a complication if you have severe problems with swallowing or breathing after treatment with BOTOX® or BOTOX® Cosmetic.
People with certain breathing problems may need to use muscles in their neck to help them breathe. These patients may be at greater risk for serious breathing problems with BOTOX® or BOTOX® Cosmetic.
Swallowing problems may last for several months. People who cannot swallow well may need a feeding tube to receive food and water. If swallowing problems are severe, food or liquids may go into your lungs. People who already have swallowing or breathing problems before receiving BOTOX® or BOTOX® Cosmetic have the highest risk of getting these problems.
Spread of toxin effects. In some cases, the effect of botulinum toxin may affect areas of the body away from the injection site and cause symptoms of a serious condition called botulism.
