What Is the Drug Metanx?

Metanx is a prescription multivitamin used to treat certain medical conditions, and the dosage varies depending on treatment use. Patients taking certain medications or with some pre-existing conditions are advised against using Metanx, and Metanx may cause detrimental side effects.


Metanx is the brand name of a prescription multivitamin manufactured by Pamlab. According to Pamlab's product website, each tablet contains 2.8 mg of folic acid (L-methylfolate), 25 mg of Vitamin B6 (pyridoxal 5'-phosphate), and 2 mg of Vitamin B12 (methylcobalamin). These vitamins work in conjunction to increase blood flow to nerves.

Medical Uses

Doctors prescribe Metanx to treat patients with hyperhomocysteinemia, a disorder characterised by high levels of homocysteine in the blood. According to coagulationfactors.com, this condition can be caused by deficiencies in the vitamins that Metanx contains, and patients with this condition can be more prone to heart disease and blot clots that might cause stroke, or miscarriages and pre-eclampsia in pregnant women.

According to the Metanx product website, doctors can also use Metanx to treat patients with diabetic neuropathy, a condition marked by numbness, burning, or tingling in the hands and feet. This condition may cause insomnia or difficulty falling asleep.

Dosages and Administration

According to the pharmaceutical information website prescription-drugs-information.com, patients should take Metanx by following the recommendations of their doctor, depending on the condition. They advise drinking a glass of water with each tablet, and spreading dosages out at regular intervals to maximise effective absorption. Metanx can be taken with or without food. Drugs.com states that missing a dose is not a cause for concern, but that patients who miss a dose should take the Metanx as soon as possible, but avoid double-dosing.


Metanx can interact negatively with a number of other prescription medications, including hydantoins (a class of anticonvulsants) and fluorouracil (a type of cancer drug).

Prescription-drugs-information.com recommends that patients who are smokers, or who consume alcohol or caffeine on a regular basis should consult a doctor before taking Metanx. Patients who suffer from anaemia, women who are pregnant or attempting to become pregnant, and nursing mothers should also consult a physician before taking this drug.

According to drugs.com, Metanx is not recommended for use in children.

Side Effects

Drugs.com reports that patients taking Metanx may experience a number of allergic reactions that range from laboured breathing, tightness or pain in the chest, rash, hives, swelling of the face, mouth, lips or tongue, dizziness or itching.

They list the most common side effects of taking Metanx as drowsiness, diarrhoea, numbness, tingling or a feeling that the entire body has become swollen.