What is actually in an IV bag

It starts with fluid

The bulk of any drip is saline, salt water at roughly the concentration of your own blood. A 500ml bag is mostly that. If you are dehydrated, this is the part doing the work, and it is also why people often feel better within the hour regardless of what else is in the bag.

Then a small number of additions

Across the menu here the additions repeat: minerals such as zinc, magnesium and copper; B vitamins; vitamin C; amino acids; glutathione. A given drip is a particular selection from that short list, in a particular volume.

Which is why the names are the least informative part. Two differently-named drips can be the same base with one ingredient changed, and a 100ml push of a single ingredient is a different proposition from a 1000ml bag with five.

Reading the menu properly

Every drip on this site lists its volume and its contents on its own page. Compare those two things and the menu becomes much easier to navigate than comparing names does.

If you cannot find the volume and the ingredient list for a drip anywhere, not just here, that is worth asking about before you book it.

Who should not have one

Intravenous fluid is not neutral. People with heart failure or kidney disease can be harmed by a volume that would be unremarkable for someone else, and some ingredients interact with prescription medication. G6PD deficiency matters for high-dose vitamin C.

That is the reason for the review before the drip, and it is why the honest answer to "can I just have one" is sometimes no.

General information, not medical advice, and not a substitute for being assessed by a clinician. Nothing here has been evaluated by the FDA. What is right for you is a decision for a provider who has your history in front of them.