Contrary to Penicillin, Vit B12 is widely used as a 3-month injection because it absorbs better as an intramuscular injection.

I find it interesting that Vitamin B12 is better absorbed through injections. My understanding is that it's not just about the type of medication but also how our bodies process it. Learning about these differences helps in making informed decisions about healthcare.

Pain is another symptom that we can not tolerate and rush to get painkiller, one of the easiest is oral route: tablets or solution

I totally get that – when it comes to pain, we all want relief fast. Using tablets or solutions for pain relief sounds like a convenient way to manage it, especially when you can do it at home. Simple solutions for common problems.

In general, every route of administration of medication has its good side but also the indication for that, so we cannot say that we like this or that we need to decide what is best for the patient and for the certain condition.

I completely agree. It makes sense that different conditions might require different ways of getting medicine into our bodies. It's not about liking one method over another but figuring out what works best for the specific situation and the person's health.

Good luck