IV Vitamin Drips Explained: What Is in Them, What They Do and Who Should Avoid Them

IV vitamin drips have moved from private hospitals and celebrity gossip columns to the high street. You can now find a "drip bar" in most large cities, and the marketing around them promises everything from an instant energy boost to a reset after a heavy weekend. As a GP who gives these drips in clinic, I want to set out plainly what is in the bag, what the evidence does and does not support, who should not have one, and what actually happens on the day. Some of what follows will put you off. That is the point of asking a doctor rather than a sales page.

What an IV drip is, and why intravenous

An IV drip is a bag of sterile fluid, usually saline or a balanced electrolyte solution, with vitamins and minerals added, run into a vein in your arm through a small cannula over 45 minutes or so. The word "infusion" means the same thing. Nothing about the fluid itself is exotic: it is the same kind of bag used on every hospital ward.

Giving a vitamin into a vein does two things that swallowing it cannot. First, it bypasses the gut, so the full dose reaches the bloodstream. That matters for people whose absorption is poor, for example after bowel surgery, with coeliac disease or Crohn's, or on long-term acid-suppressing tablets. Second, it allows doses that tablets cannot deliver. Vitamin C is the clearest example: the gut can only absorb a few hundred milligrams at a time however many tablets you take, whereas a drip delivers 8 grams directly.

What a drip does not do is store anything. Water-soluble vitamins (the B group and vitamin C) are used or passed out in the urine within hours to days. A drip is a top-up, not a reservoir.

What is actually in a vitamin drip

Most vitamin drips on the market are a version of the Myers cocktail, a mix first used by an American physician in the 1960s. Ours contains B vitamins, vitamin C, magnesium, calcium, zinc and selenium in a 1 litre bag. The other drips are built from that base, or from a single high-dose ingredient, with injections added after the bag has finished. In our clinic the menu is:

• Myers Cocktail Drip, £149. The all-round base mix, 45 minutes.
• Energy Drip, £169. The Myers cocktail with a 5mg vitamin B12 (methylcobalamin) injection at the end. Vitamin B12 contributes to normal energy metabolism and the reduction of tiredness and fatigue.
• Vitamin C Drip, £139. 8 grams of vitamin C in 1 litre. Vitamin C contributes to the normal function of the immune system and to normal collagen formation.
• Glow Drip, £169. The vitamin C drip followed by a 750mg glutathione push.
• Calm Drip, £199. The Myers cocktail with an extra 1 gram of magnesium in the bag. Magnesium contributes to normal muscle function, normal psychological function and the reduction of tiredness and fatigue.
• Immunity Drip, £199. Two bags in one visit: the Myers cocktail, then 8 grams of vitamin C. About 90 minutes.
• The Works, £259. Myers, then vitamin C, then a glutathione push and a B12 injection, each given separately in sequence. About 90 minutes.
• NAD+ infusions, from £299. A different kind of product altogether, run slowly over 2 to 3 hours with strict suitability rules. It has its own guide.

When you book a drip you can also tick add-ons, each given separately after the bag rather than mixed into it: a glutathione injection (£35), a vitamin B12 injection (£20), a vitamin B complex injection (£25) or a vitamin D injection (£65, which includes the doctor confirming at your consultation that it is right for you).

What the evidence actually shows

This is where I part company with most of the websites selling drips. The honest summary is in three parts.

Where the evidence is good. If you have a measured deficiency, replacing the missing vitamin or mineral works, and in some situations the injectable or intravenous route is the right one. Vitamin B12 injections for people who cannot absorb B12 are standard NHS treatment. Magnesium by vein is used in hospitals every day. Intravenous vitamin C corrects scurvy quickly. None of this is controversial.

Where the evidence is thin. For people who are not deficient, the studies of vitamin drips for tiredness, immunity, recovery or general wellbeing are small, mostly short, and often without a proper comparison group. The Myers cocktail has been studied in a handful of trials, and the largest of them found it no better than a placebo drip for fibromyalgia pain. Many people do feel better after a drip. Some of that is the litre of fluid, some of it is lying still for 45 minutes, and some of it is expectation. Those are real effects, but they are not the vitamins doing anything a tablet could not.

What that means for your money. If you feel run down and have not had a blood test, a test is usually the better first spend. A vitamin B12 test, a vitamin D test or a ferritin test costs a fraction of a drip and tells you whether there is something to correct, and how best to correct it. I will say this to you at your consultation too, and nobody is ever pushed into a drip they do not need.

Who should not have a vitamin drip

Every drip in our clinic starts with a short consultation with the doctor, and some people are told no. Please tell us before your appointment if any of these apply, so we can advise or rebook you without charge:

• You are pregnant or breastfeeding.
• You have a kidney or liver condition, or heart failure. A litre of fluid and a gram of magnesium are not trivial for a struggling heart or kidney.
• You are under 18, or over 60.
• You have a known allergy to any vitamin or mineral.
• You have a haemolytic condition such as G6PD deficiency, sickle cell, spherocytosis or thalassaemia. High-dose vitamin C in particular can trigger red-cell breakdown in G6PD deficiency. If you are of African, Mediterranean, Middle Eastern or South Asian heritage and have never been tested, a G6PD screen before a vitamin C drip is sensible.
• For the vitamin C drips: you have had kidney stones, or you have diabetes. We adjust the plan rather than necessarily cancel, but we need to know.
• You currently have a fever. The Immunity drip in particular waits until it settles.

What happens on the day

Eat something and drink water before you come; please do not arrive fasting. Bring a list of your medications and any supplements. You start with the consultation, then a check of your pulse and blood pressure. A small cannula goes into a vein in your arm or hand, which is the only uncomfortable moment, and the bag runs over about 45 minutes while you sit back. For the two-bag drips allow about 90 minutes. Any injections are given after the bag has finished. Before you leave we check your pulse and blood pressure again. You can drive home afterwards.

During the drip a flush, a warm feeling or a metallic taste is normal and passes. Magnesium relaxes blood vessels, which is why we check your pressure before and after the Calm drip.

Side effects

Serious reactions to vitamin drips are rare, which is one reason they have spread so far. The common after-effects are mild tiredness or a headache for a day, a bruise at the cannula site, and more frequent trips to the toilet as the fluid passes through. A hot, swollen or painful drip site, a fever, or a rash in the days afterwards is not normal: contact us. Severe breathing difficulty or swelling of the face during or after a drip is an emergency: call 999.

The risks rise when a drip is given to the wrong person, which is the whole argument for a medical consultation before the cannula goes in. Fluid overload in someone with heart failure, a high magnesium level in someone with poor kidneys, or haemolysis in someone with undiagnosed G6PD deficiency are all avoidable with a few questions and, sometimes, a blood test.

How long does a drip last?

The fluid is gone within a day. Water-soluble vitamins are used or excreted over hours to days, and your blood levels settle back to where your diet and gut put them within a week or two. The injectable B12 is the exception: the body stores B12 in the liver, so a 5mg injection can lift your level for months. If you are hoping a drip will carry you through a season, it will not. If you are using one to recover from a specific stretch of poor eating, travel or illness, that is a more realistic expectation.

Drip bars versus a GP-led clinic

A drip bar and a GP clinic can put the same bag of fluid into your arm. The difference is what happens before and after. In our clinic the drip is prescribed, not purchased: a doctor takes a short history, checks your pulse and blood pressure, decides whether the product is suitable for you, gives it in a clinical room, watches you for 30 minutes and checks you again before you leave. If the doctor thinks a blood test would serve you better than a drip, you will be told so, and the clinic is regulated by the Care Quality Commission like any other medical service. Price alone does not tell you which you are getting.

Where we do it

Drips are given by Dr Ahmed in the Infusions and Vitamins Room at OneMedicine, 1 High Street, Kings Heath, Birmingham B14 7AR, opposite Kings Heath railway station with free parking at the rear of the clinic. Everything is booked online, with the consultation built into the appointment.

Frequently asked questions

What is in an IV vitamin drip?

A litre of sterile fluid with vitamins and minerals added. The usual base is the Myers cocktail: B vitamins, vitamin C, magnesium, calcium, zinc and selenium. Single-ingredient drips such as high-dose vitamin C, and add-on injections such as B12 or glutathione, are built around it.

What does an IV drip do?

It delivers vitamins and minerals straight into the bloodstream, bypassing the gut, in doses tablets cannot match. If you are deficient it corrects the deficiency quickly. If you are not, the honest answer is that most people feel refreshed for a day or two, largely from the fluid and the rest, and the evidence for anything beyond that is thin.

How long does an IV drip take?

About 45 minutes from start to finish for a single bag, including the consultation and the checks before you leave. Two-bag drips take about 90 minutes. NAD+ infusions run slowly over 2 to 3 hours.

How long does a vitamin drip last?

The fluid is gone within a day and the water-soluble vitamins within a week or two. A B12 injection is stored and lasts for months. Nothing in a drip builds a reserve you can draw on later.

What are the side effects of an IV drip?

A flush or metallic taste during the drip, mild tiredness or a headache afterwards, a bruise where the cannula went in. A hot or painful site, a fever or a rash afterwards needs a call to us. Serious reactions are rare and are mostly avoided by not giving drips to people with heart, kidney or red-cell conditions.

How much does an IV drip cost?

In our clinic a Myers cocktail drip is £149, a vitamin C drip £139, and the two-bag drips £199 to £259. The price includes the GP consultation, the drip and the observation afterwards. NAD+ infusions start at £299.

Are IV drips worth it?

For a measured deficiency that tablets cannot fix, yes. For general wellbeing in someone who is not deficient, the science says not much, and a blood test is a better first purchase. Many people still choose a drip for how it makes them feel, and that is a reasonable choice as long as it is an informed one.

Can I get an IV drip near me in Birmingham?

Yes. We give drips at our CQC-registered clinic in Kings Heath, south Birmingham, opposite the railway station, with free parking behind the clinic. Book online and the doctor's consultation is part of the appointment.

Written by Dr Ibrar Ahmed — MBChB MRCP MRCGP PhD PG Dip (Cardiology)
Specialist interest: Cardiovascular Medicine · OneMedicine, CQC-registered clinic