When it comes to the most effective injection method, intravenous is the best just as you have highlighted in this. Even though the method I'm quite used to for treatments is the intramuscular method.

I would favour alternative approaches such as physical therapy, heat or cold therapy and non-pharmacological pain management methods like meditation and relaxation.

These are great alternatives that one can even get involved in at any time without waiting for sickness/disease to set in. It helps the body to maintain its right for optimal performance.

Amazing piece put together on this. Good luck, @kouba01.