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What is B Complex: Uses, Warnings & Interactions

Updated Jan 12, 2021  •  Published Dec 30, 2020

B Complex overview

BRAND NAMES:

  • B-50 Complex, B6-Folic Acid, Balanced B50, B-Complex-100, B-Complex-50, Carlson Homocysteine Guard, Cerefolin, Extress Super, Folast, Folika-NC, Foltanx, Lev-Tov, Nature's Blend Balance B-100, Nature's Blend B Complex #1, Nature's Blend B Complex + Folic Acid, PremierPro Rx Infuvite PEDiatric, M.V.I. Pediatric, M.V.I.ADULT, B-Complex, Infuvite, Infuvite Adult, Infuvite Adult Novaplus, Infuvite Pediatric, Infuvite PEDiatric Novaplus, M.V.I.-12 w/o Vitamin K, PremierPro Rx Infuvite Adult, B-Complex, Vitamin B Complex 100

Generic Names:

  • B Complex

Uses:

  • Supplies your body with B vitamins. You might need extra B vitamins because of an illness or other medicines that you are using. You might not be getting enough B vitamins from the food you eat, or for other reasons., Prevents a vitamin deficiency in patients receiving nutrition through an IV (TPN)., Provides your body with B vitamins.

Therapeutic Classes:

  • Vitamin Combination, Vitamin Combination, Adult Formula, Vitamin B Combination, Vitamin B/Iron Combination, Vitamin/Mineral Combination, Adult Formula, Vitamin/Nutriceutical Combination, Adult Formula, Nutritive Agent, Antidote, Parenteral Vitamin, Vitamin/Mineral Combination, Adult Formula, Vitamin B Combination, Vitamin Combination, Adult Formula, Vitamin B Combination, Vitamin Combination, Adult Formula

Forms:

  • Liquid, Chewable Tablet, Long Acting Tablet, Tablet, Liquid Filled Capsule, Long Acting Capsule, Capsule, Injectable, Injectable

How it’s taken:

  • By injection, By injection, By mouth

What form(s) does B Complex come in

  • Liquid

  • Chewable Tablet

  • Long Acting Tablet

  • Tablet

  • Liquid Filled Capsule

  • Long Acting Capsule

  • Capsule

  • Injectable

  • Injectable

What are common B Complex doses?

  • Bottle 100 Capsules

  • Bottle 100 Tablets

  • Bottle 100 Tablets

  • Vial 30ML of

Common B Complex prescriptions

  • B Complex
    100 capsules bottle

How to take B Complex

  • Your doctor will prescribe your dose and schedule. This medicine is given through a needle placed in one of your veins or as a shot into one of your muscles.

  • Injection routeA nurse or other health provider will give you this medicine.

  • Missed dose: Injection routeCall your doctor or pharmacist for instructions.

  • Missed dose: Injection routeCall your doctor or pharmacist for instructions.

  • Injection routeA nurse or other health provider will give you this medicine.

  • Your doctor will prescribe your dose and schedule. This medicine is given through a needle placed in one of your veins or as a shot into one of your muscles.

  • Injection routeYour doctor will prescribe your dose and schedule. This medicine is given through a needle placed in a vein.

  • This medicine will be mixed and added to your parenteral nutrition (TPN) bag which is given IV. Make sure you understand how to mix the vitamins.

  • Injection routeA nurse or other health provider will give you this medicine.

  • Injection routeYou may be taught how to give your medicine at home. Make sure you understand all instructions before giving yourself an injection. Do not use more medicine or use it more often than your doctor tells you to.

  • The vitamins will make your TPN bag turn yellow. This is normal.

  • Injection routeA nurse or other health provider will give you this medicine.

  • Injection routeYou may be taught how to give your medicine at home. Make sure you understand all instructions before giving yourself an injection. Do not use more medicine or use it more often than your doctor tells you to.

  • The vitamins will make your TPN bag turn yellow. This is normal.

  • Injection routeYour doctor will prescribe your dose and schedule. This medicine is given through a needle placed in a vein.

  • This medicine will be mixed and added to your parenteral nutrition (TPN) bag which is given IV. Make sure you understand how to mix the vitamins.

  • If you are using the sublingual liquid, measure the liquid with the dropper that comes with the bottle. Squeeze the dropper to place the liquid under your tongue. Hold the liquid under your tongue for about 30 seconds, then swallow it.

  • Measure the oral liquid medicine with a marked measuring spoon, oral syringe, or medicine cup. You might need to shake the liquid just before you use it.

  • The chewable tablet must be chewed completely before you swallow it.

  • Swallow the extended-release tablet, extended-release capsule, or liquid-filled capsule whole. Do not crush, break, or chew the tablet or capsule.

  • Follow the instructions on the medicine label if you are using this medicine without a prescription.

  • Oral routeCarefully follow your doctor's instructions about any special diet.

  • Your doctor will tell you how much medicine to use. Do not use more than directed.

  • If you are using the sublingual liquid, measure the liquid with the dropper that comes with the bottle. Squeeze the dropper to place the liquid under your tongue. Hold the liquid under your tongue for about 30 seconds, then swallow it.

  • Swallow the extended-release tablet, extended-release capsule, or liquid-filled capsule whole. Do not crush, break, or chew the tablet or capsule.

  • Follow the instructions on the medicine label if you are using this medicine without a prescription.

  • Measure the oral liquid medicine with a marked measuring spoon, oral syringe, or medicine cup. You might need to shake the liquid just before you use it.

  • The chewable tablet must be chewed completely before you swallow it.

  • Oral routeCarefully follow your doctor's instructions about any special diet.

  • Your doctor will tell you how much medicine to use. Do not use more than directed.

What to do if you miss a dose of B Complex

  • Keep all medicine out of the reach of children. Never share your medicine with anyone.

  • Take a dose as soon as you remember. If it is almost time for your next dose, wait until then and take a regular dose. Do not take extra medicine to make up for a missed dose.

  • Missing a dose of a vitamin supplement is usually not a cause for concern.

  • This medicine needs to be given on a regular schedule. If you miss one day, skip that dose and return to your normal schedule. You should not use two doses at the same time.

  • Missing one dose of vitamins is usually not a cause for concern.

  • Injection routeAsk your pharmacist, doctor, or health caregiver about the best way to dispose of any leftover medicine, containers, and other supplies. Throw away old medicine after the expiration date has passed.

  • Keep all medicine out of the reach of children. Never share your medicine with anyone.

B Complex contraindications

  • This medicine is not right for everyone. You should not receive it if you had an allergic reaction to dexpanthenol, niacinamide, pyridoxine, riboflavin, thiamine, or benzyl alcohol.

  • You should not use this medicine if you have ever had an allergic reaction to a vitamin that is in this medicine. You should not use this medicine before being tested for anemia.

  • You should not use this medicine if you have had an allergic reaction to any kind of vitamin B.

B Complex warnings

  • Tell your doctor if you are pregnant or breastfeeding.

  • Chest pain, trouble breathing, or coughing up blood

  • Numbness or weakness in your arm or leg, or on one side of your body, pain in your lower leg

  • Sudden or severe headache, problems with vision, speech, or walking

  • Tell any doctor or dentist who treats you that you are using this medicine. This medicine may affect certain medical test results.

  • Your doctor will do lab tests at regular visits to check on the effects of this medicine. Keep all appointments.

  • Make sure your doctor knows if you are pregnant or breast feeding, or if you have kidney disease.

  • Make sure your doctor knows if you are pregnant or breast feeding. Tell your doctor if you have liver disease or kidney disease.

B Complex interactions

  • Make sure your doctor knows if you are pregnant or breast feeding. Tell your doctor if you have liver disease or kidney disease.

  • Make sure your doctor knows if you are using phenytoin (Dilantin®), methotrexate (Trexall®), or levodopa (Sinemet CR®, Stalevo®). Tell your doctor if you are using hydralazine, isoniazid, or chloramphenicol.

  • There are many other drugs that can interact with a multivitamin. Make sure your doctor knows about all other medicines you are using.

  • You should not use other vitamin supplements while taking this medicine unless your doctor tells you to.

  • Tell your doctor if you are pregnant or breastfeeding.

B Complex side effects

Serious Side Effects

  • Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing

  • Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing

  • Dizziness or headache.

  • Rash.

  • Seeing double.

  • Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing

  • Chest pain, trouble breathing, or coughing up blood

  • Numbness or weakness in your arm or leg, or on one side of your body, pain in your lower leg

  • Sudden or severe headache, problems with vision, speech, or walking

Less Serious Side Effects

  • Mild diarrhea

  • Pain, itching, swelling, or a lump under your skin where the needle is placed

  • Seeing double.

  • Agitation or anxiety.

  • Dizziness or headache.

  • Rash.

  • Nausea, diarrhea, gas.

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