Health Professional
The short answer is "It depends." In general, people with Type 1 diabetes (which is an auto-immune disease) need insulin injections. People with Type 2 diabetes may need insulin injections if other treatments have not helped.
You might find the information in these two links helpful:
http://www.diabetesaustralia.com.au/Living-with-Diabetes/Type-1-Diabetes/
http://www.diabetesaustralia.com.au/Living-with-Diabetes/Type-2-Diabetes/Managing-Type-2-Diabetes/
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to your account or now (it's free).Credentialled Diabetes Educator (CDE), Diabetes Educator
It is typical that when people are diagonosed with type 1 diabetes, they are often young (but not always), have a period of intensive thirst and frequent urination as well as weight loss. They usually become very unwell and once diagonsed go onto injecting insulin straight away.
Those diagnosed with type 2 needing insulin are usually older, overweight, can have a family history of diabetes and have previously or still be on a variety of medications including tablets to assist in keeping their blood glucose levels down.
In saying all this, you may be able to work it out, but I am sure they will not mind you asking them directly especially if you are offering assistance in case of emergency.
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