Is Thirmik a good alternative to the osteoporosis shots?

No. There is no supplement you can take that will fix your osteoporosis. Thirmik has been discussed before on this forum.

You may want to start doing your own research on the different approaches that people are implementing to deal with osteoporosis. You might review the many subcategories under Osteoporosis to start.
You want to share more information with us such as your age, is your osteoporosis caused by loss of hormones during menopause, what pill were you taking and are you seeing a physician who is trained in treating Osteoporosis.

I am 65 yrs old. I was taking Alendeonate.

@patches1 Your age and DEXA scores are important before offering any advice.

In the meantime, check out Brick House Bones on Facebook, by Dr Lisa Moore, a PT specializing in osteoporosis. She has great free exercise videos and lots of advice. Medications are not discussed though, but you will learn other tips to help "fracture proof" yourself.

I am 77 and do not take anything for osteoporosis. Recently, my dog accidentally caused me to fall down 8 stairs. The result is/was I broke my neck at C2, 8 broken ribs and a fractured sternum. I'm wearing a neck brace and will see a Neurologist tomorrow. I'm wondering what vitamins, nutrients might be beneficial for me.

@tishajoy
I am so sorry that you have been hurt
What is your dexa scores? What has your endocrinologist said about treatment especially after your diagnosis.
If you have severe Osteoporosis it is extremely unlikely that
Vitamins or other supplements can help lower your risk.
Have you researched osteoporosis and the current medications available to us.
If you haven't already, please start looking for an osteoporosis specialist near you. They are usually the kind of doctor that treats osteoporosis.
If you have access to YouTube check out the great presentations on OsteoBoston.