How Much B6 in Diclegis? | Safe Doses For Nausea Relief

What Diclegis Is And How It Works

Diclegis is a prescription medicine used to ease nausea and vomiting in pregnancy when diet changes alone are not enough. It combines an antihistamine called doxylamine with vitamin B6, also known as pyridoxine, in a single delayed release tablet.

The delayed release design means the tablet dissolves slowly as it moves through the gut. That timing matters, because the goal is steady symptom relief across the day and night rather than a short burst of effect.

Core Ingredients And Their Roles

Each delayed release tablet contains 10 mg of doxylamine succinate and 10 mg of pyridoxine hydrochloride according to the FDA prescribing information. Doxylamine blocks certain histamine signals, which reduces nausea in some people. Pyridoxine acts as vitamin B6, a vitamin that helps enzymes work and has a long history of use for morning sickness.

This fixed dose combination means the vitamin B6 amount does not change on its own. When the dose of Diclegis goes up or down, the B6 intake adjusts in parallel.

Why Vitamin B6 Helps With Morning Sickness

Vitamin B6 takes part in many enzyme reactions that handle amino acids and neurotransmitters. Several clinical trials found that modest doses of pyridoxine ease mild to moderate nausea in early pregnancy, which led groups such as the American College of Obstetricians and Gynecologists to list vitamin B6 as a first step treatment.

Because Diclegis joins pyridoxine with doxylamine in one pill, it offers both approaches together. The big question for many patients is how that built in B6 compares with daily vitamin needs and safe upper limits.

How Much B6 In Diclegis Per Tablet?

Every Diclegis delayed release tablet supplies 10 mg of pyridoxine hydrochloride, which counts as 10 mg of vitamin B6. The same tablet also carries 10 mg of doxylamine succinate, so the medicine always delivers those two amounts in tandem.

This 10 mg figure comes from the official product label and is repeated across independent drug reference sites. When your prescription lists a certain number of Diclegis tablets per day, you can multiply that number by 10 to see the total B6 dose from the medicine alone.

Usual Prescribed Tablet Counts

Typical dosing schedules for the doxylamine and pyridoxine combination start with two tablets at bedtime, then adjust stepwise based on how severe the nausea remains. Clinical guidance from sources such as the Mayo Clinic drug monograph and drug reference databases describe a maximum of four delayed release tablets in one day.

Because each tablet contains 10 mg of vitamin B6, this schedule means:

• Two tablets per day give 20 mg of B6.
• Three tablets per day give 30 mg of B6.
• Four tablets per day give 40 mg of B6.

That range of 20 to 40 mg per day sits well above daily dietary requirements, so it should always be used under the guidance of a pregnancy care provider.

Vitamin B6 Dose In Diclegis And Similar Products

Diclegis is not the only medicine that uses the doxylamine and pyridoxine pairing. Generic delayed release tablets with the same 10 mg and 10 mg strengths, as well as extended release products such as Bonjesta with 20 mg of each ingredient, follow similar dosing ideas.

Looking at these options side by side makes it easier to see how much vitamin B6 is built into each choice.

Product	Vitamin B6 Per Tablet (mg)	Typical Daily B6 Range (mg)
Diclegis delayed release tablet	10	20–40 (2–4 tablets)
Generic doxylamine 10 mg / pyridoxine 10 mg DR	10	20–40
Bonjesta extended release tablet	20	20–40 (1–2 tablets)
Standalone pyridoxine 10 mg tablet	10	10–30 (diet dependent)
Standalone pyridoxine 25 mg tablet	25	25–75 (diet dependent)
Prenatal vitamin with B6	1–2	1–2 from supplement only
Typical diet in pregnancy	1–3	Varies with food choices

Figures in this table come from product labels and standard drug reference tables. Exact values can differ slightly by country and brand, so your own package insert is always the final word on contents.

Daily B6 From Diclegis Versus Recommended Intake

For adults, typical dietary recommendations suggest around 1.3 mg of vitamin B6 per day, with pregnancy raising that target to about 1.9 mg. The NIH Office of Dietary Supplements lists 1.9 mg per day as the reference intake for pregnant adults in the United States.

At the same time, safety bodies set upper intake levels. In the United States, those limits sit at 100 mg of vitamin B6 per day for adults, including pregnant people, while some European agencies use lower caps between 12 and 25 mg for long term supplemental use.

How Diclegis B6 Fits Within Safe Limits

The highest approved Diclegis schedule uses four tablets per day, which gives 40 mg of pyridoxine from the medicine alone. That amount stays under the 100 mg upper intake level used in United States guidance, yet it rises above the levels that some European authorities prefer for routine supplementation.

This difference can feel confusing, but context helps. The combination of doxylamine and pyridoxine has been studied in pregnancy since the 1970s, and modern prescribing information reflects that trial history. Doses up to 40 mg of B6 in this controlled setting sit within what those studies observed.

Even so, only a clinician who knows your medical history can judge whether this range makes sense for you. Kidney disease, nerve problems, and other medicines that affect B6 handling can change the balance between benefit and risk.

How The Diclegis Schedule Translates To B6 Over Time

Dosing schedules for Diclegis ramp up stepwise. The idea is to find the lowest number of tablets that keeps nausea under control while keeping drowsiness and other side effects tolerable.

A common approach looks like this, based on product labeling and drug reference summaries such as the doxylamine and pyridoxine dosage guide:

1. Day 1: Two tablets at bedtime (20 mg B6).
2. Day 2: Repeat two tablets at bedtime if symptoms have eased.
3. Day 3: If nausea persists, add one tablet in the morning while keeping two at bedtime (30 mg B6).
4. Day 4 and beyond: If symptoms still break through, add one tablet in the mid afternoon as well, for a total of four tablets per day (40 mg B6).

Once you reach a level that keeps symptoms manageable, your prescriber may hold that dose or taper down later in pregnancy as morning sickness fades.

Daily Schedule	Number Of Tablets	Total B6 From Diclegis (mg)
Bedtime only	2	20
Morning + bedtime	3	30
Morning + afternoon + bedtime	4	40
Reduced maintenance dose	1–2	10–20
Stopped Diclegis	0	0

Patients sometimes worry that this ramping schedule will cause B6 overload. In practice, the combination is designed around studied ranges, and the slow release tablets spread that intake across the day.

Combining Diclegis With Other Sources Of Vitamin B6

Diclegis is rarely the only source of vitamin B6 in a pregnant person’s routine. Most people also take a prenatal multivitamin and eat foods that carry pyridoxine, such as poultry, fish, potatoes, bananas, and fortified grains.

The consumer fact sheet from the NIH Office of Dietary Supplements notes that diet alone usually supplies enough B6 for adults, including during pregnancy. Nausea treatment is one of the few areas where supplements and medicines often push intake higher than standard dietary targets.

Food Sources And Prenatal Vitamins

A typical balanced diet in pregnancy might supply 1 to 3 mg of vitamin B6 per day without any effort. A standard prenatal vitamin often adds another 1 to 2 mg. Together, diet plus prenatal vitamin land close to the 1.9 mg daily reference intake.

When Diclegis enters the picture, the medicine becomes the largest B6 contributor. At a four tablet schedule, 40 mg from Diclegis dwarfs the few milligrams from food and prenatal products.

Extra B6 Supplements While On Diclegis

Some people arrive at pregnancy already taking separate B6 supplements for mood, nerve pain, or premenstrual symptoms. Once Diclegis starts, those older supplements may push total B6 intake toward upper limits, especially if doses above 25 mg per day are involved.

Make a full list of everything that contains pyridoxine, including energy drinks, multivitamins, and standalone tablets, then share that list with your obstetric provider. The usual goal is to stay within studied ranges while still getting enough symptom control to eat and drink well.

Safety, Side Effects, And Warning Signs

Doxylamine and pyridoxine combinations are among the most widely studied medicines used in pregnancy for nausea. Even so, no medicine is risk free, and vitamin B6 itself can cause nerve problems when taken at high doses over long periods.

Classic B6 toxicity involves sensory nerve changes, with tingling, numbness, and balance issues. These cases usually appear after months or years of intake well over 100 mg per day, often from high dose supplements rather than prescribed combinations.

When B6 Intake May Be Too High

If your total intake sits near or above 100 mg per day from all sources, risk rises over time. Warning signs worth urgent medical advice include new numbness in the feet or hands, burning sensations, or trouble with coordination.

Doses used with Diclegis rarely reach those levels on their own. Risk climbs when large standalone B6 supplements stack on top of full dose Diclegis, or when kidney disease slows clearance of the vitamin.

General Side Effects Of Diclegis

The most common side effect comes from the doxylamine component, which often causes drowsiness. Dry mouth, dizziness, and constipation can also appear. Because the medicine can make you sleepy, driving or operating machinery is not advised until you know how you respond.

Allergic reactions are uncommon but serious. Trouble breathing, swelling of the face or throat, or a rash that spreads quickly all call for emergency care.

Practical Tips For Tracking Your B6 While Taking Diclegis

Keeping an eye on vitamin B6 intake while using Diclegis does not need to feel complicated. A few simple habits can keep your total intake in a safe and useful range.

Step One: Write Down Every Source

Start by listing your current dose of Diclegis, your prenatal vitamin brand, any extra supplements, and regular fortified foods. Look on labels for “pyridoxine,” “vitamin B6,” or both. Jot down the milligram amounts next to each one.

Once everything is on paper, add up the B6 from Diclegis itself, then add diet and supplement estimates. This number does not need to be perfect to give your clinician a clear picture of your intake.

Step Two: Bring The List To Your Appointment

Share the list with your obstetric provider or midwife at your next visit. Ask whether your total intake sits in a range they feel comfortable continuing. If the number seems higher than needed, options include trimming other supplements or lowering the Diclegis dose once symptoms ease.

If nausea remains intense even at four tablets per day, your clinician might suggest extra treatments while still keeping an eye on vitamin levels.

Step Three: Watch Your Symptoms Over Time

Pay attention both to nausea and to any new nerve sensations. Less nausea, better appetite, and steady weight gain in early pregnancy are signs that the plan is working.

New tingling, numbness, or clumsiness deserve prompt medical attention, especially if they appear after months of high total B6 intake from several sources.

When To Call Your Healthcare Professional Urgently

Morning sickness can make daily life hard, but certain red flags call for quick help. Severe vomiting that prevents you from keeping down fluids, signs of dehydration such as dark urine or dizziness, blood in vomit, or weight loss all need urgent assessment.

If you suspect you have taken far more Diclegis or vitamin B6 than prescribed, contact your prescriber, poison control, or emergency services right away. Overdose may bring confusion, rapid heartbeat, seizures, or severe drowsiness that does not improve.

This article offers general education about the vitamin B6 content of Diclegis and related doses. It does not replace personalized medical advice. Always work with your own healthcare team before starting, stopping, or changing any medicine or supplement during pregnancy.