IV therapy — short for intravenous therapy — means delivering fluids, and sometimes vitamins, minerals, or medications, directly into a vein through a small flexible catheter. Hospitals have used IVs for decades to treat dehydration, deliver medications, and correct nutrient deficiencies. Over the last fifteen years, “elective” IV therapy has also become a wellness service: people book a drip for hydration after a rough night, recovery after a race, or a pick-me-up during a busy week.
This guide explains how it works, what’s typically in the bag, and — just as importantly — what the evidence does and doesn’t support.
How IV therapy works
A licensed clinician places a thin plastic catheter (not a needle — the needle is removed once the catheter is in) into a vein, usually in the hand or forearm. A bag of fluid hangs above, and gravity or a pump moves the fluid into your bloodstream over 30–60 minutes.
Because the fluid goes straight into circulation, it skips the digestive system entirely. That’s the core idea behind IV therapy: 100% of what’s infused reaches your bloodstream, whereas oral vitamins and fluids have to be absorbed through the gut first.
That’s true — but it isn’t automatically a benefit. Your kidneys clear excess water-soluble vitamins quickly, so a high blood level after an infusion usually returns to baseline within hours to a day. Whether a brief spike does anything for a healthy person is the real question, and it’s covered below.
What’s in a typical IV drip
Almost every wellness drip is built from three layers:
- A base fluid (the “bag”). Usually 500 mL–1 L of normal saline (0.9% sodium chloride) or lactated Ringer’s, which adds potassium, calcium, and lactate. This is the hydration part — and the best-supported part.
- Nutrients. Common choices are vitamin C, B-complex, vitamin B12, magnesium, calcium, zinc, and amino acids (taurine, glycine, or a Bi-Amino blend). Some clinics add glutathione, biotin, a vitamin D3 shot, or Lipo-B (MIC).
- Optional medications. Prescription add-ons such as ondansetron (Zofran) for nausea or ketorolac (Toradol) for pain. These are real drugs with real side effects and should only be given after a clinician reviews your history.
The best-known formula is the Myers’ cocktail, popularized by Baltimore physician John Myers in the 1970s: magnesium, calcium, B vitamins, and vitamin C. Most “signature drips” on clinic menus are variations on it.
Use the Drip Decoder to break down any clinic menu ingredient by ingredient.
Wellness IV therapy vs. medical IV therapy
| Medical IV therapy | Elective (wellness) IV therapy | |
|---|---|---|
| Why it’s given | To treat a diagnosed condition — severe dehydration, infection, deficiency, inability to eat | Patient-requested, for hydration or short-term wellness |
| Who decides | A clinician based on symptoms and tests | Patient chooses, clinician screens and approves |
| Insurance | Often covered | Usually self-pay (HSA/FSA sometimes eligible) |
| Evidence base | Strong for the indications it’s used for | Strong for rehydration; limited for most vitamin “boost” claims |
Some infusions sit squarely in medical territory — IV iron for iron-deficiency anemia is a good example — and can be prescribed after lab testing.
What the evidence says
Here’s an honest summary, because most of what you’ll read online is marketing:
- Rehydration — well supported. IV fluids reliably rehydrate. For mild dehydration, drinking an oral rehydration solution usually works just as well; IV is faster and helpful when you’re vomiting or can’t keep fluids down.
- Correcting a true deficiency — well supported in the right patients (for example, IV iron or B12 when oral forms fail or can’t be absorbed).
- “Energy,” “immunity,” “detox,” and anti-aging claims — limited or unproven. The Merck Manual’s 2025 review concludes there is not enough scientific evidence that IV vitamin therapy produces these benefits or treats any disease. Very few rigorous trials have tested it in people who aren’t deficient.
- Feeling better afterward — real, but hard to attribute. People often feel noticeably better after a drip. Some of that is rehydration, some is anti-nausea or pain medication if added, and some is the hour of rest. That’s not nothing — just be skeptical of claims beyond it.
Read more: IV vs. oral supplements.
Who should talk to a doctor first
IV therapy isn’t for everyone. People with heart failure, kidney disease, uncontrolled high blood pressure, G6PD deficiency (relevant for high-dose vitamin C), certain allergies, or who are pregnant or breastfeeding need a careful medical review — and sometimes shouldn’t get elective IVs at all. See Is IV therapy safe? for the full list.
Who’s allowed to give IV therapy in Texas
Since September 1, 2025, Texas’s Jenifer’s Law (HB 3749) requires elective IV therapy outside physician offices and licensed facilities to be ordered by a Texas-licensed physician (or a PA/APRN they delegate to) after an assessment, and administered only by a physician, PA, APRN, or RN. Read the full Texas law explainer.
The bottom line
IV therapy is a fast, reliable way to rehydrate, and a legitimate medical tool for certain deficiencies. Most of its wellness claims go further than the evidence. If you try it, choose a clinic with real medical oversight, tell them your full health history, and treat bold promises as a red flag.
Frequently asked questions
Is IV therapy the same as what you get in a hospital?
The base fluids are the same — sterile saline or lactated Ringer's. What's different is the reason: hospitals give IVs to treat a diagnosed medical need, while elective IV therapy is chosen by the patient for wellness or short-term symptom relief.
How long does an IV drip take?
Most standard hydration and vitamin drips take 30–60 minutes. NAD+ infusions often take considerably longer because they have to run slowly to stay comfortable.