For anyone in the US, on Saturday morning on CBS at 10am EST (you may need to check your local channels for time, etc.) There is a show called Lucky Dog. It follows a trainer, Brandon McMillan as he gets a dog that a shelter calls him about that is not showing well. He trains the dog and finds them their perfect forever home. He sometimes trains them for the families needs or lifestyles. Many times he has trained them as companion dogs, therapy dogs and service dogs. They are airing repeats right now so you might get to see one of those he has done. One of his last episodes was where he trained a companion dog for an employee who has a condition that causes her to constantly develop kidney stones. He trained the dog to wear saddle bags that would hold all her meds and bring them to her when needed, because she would often have spells that would either knock her to her knees or make her pass out. With the dog she would wake to a companion and have her meds right there for her. Of course not being a service dog she could not take him everywhere with her. But I am sure if that need arose for her she could get the dog certified.
He has trained one for a young man who lost both legs and part of a arm in the war. That dog was a service dog and was trained to take his weight going down stairs in his prosthetic's. He also picked things up and other things. There was also another Vet that had back issues and PTSD, he trained his dog to pick up sunglasses, keys, water bottles, etc and to also be support for the PTSD.
He has done several amazing stories on dogs. I got hooked on it,
And after it, stick around, if it is the same lineup, you will get to see Dr. Chris Pet Vet. He's from Australia, and not hard on the eyes at all.

Hi I part trained my dog to be of help. She knows to get my phone and will pick this up and she has alerted neighbors with continuous loud barking when I passed out.

Wowwww that's awesome!! so basically they do exactly what a seeing eye dog does...I love animals my life wouldn't be complete without them I already have 3 dogs but in the future if this nasty disease keeps getting worse that could definitely be a possibility.sounds like their very helpful...thanks to all who answered

There are tons of things a service dog can help us with. If we drop something they can pick it up instead of us bending over and making that horrible sound we all make when the pain hits. They can retrieve medications. They alert if you have any health condition that may require it such as POTS, syncopy, asthma and so on, they will make you sit or lay down as is necessary until they know your episode has passed and then allow you to lean on them and use them as support to get back up (they will actually stiffen their bodies and take some of your weight on). They can go and get family members if you need them, they can be support (take your weight again) when you feel unbalanced, need help on stairs, walking on uneven ground. They assist if you fall. Retrieve items for you, helping pull laundry out of the dryer. I've read they can help bring in groceries. They can also help with depression. Assist with standing from a chair, open doors. I've even read they can wake you from nightmares. They can be trained for almost anything you need help with.

I have also heard of diabetes service dog that pick up hypo glycemia do you can take glucose pills or eat. Or alert other with persistant barking