DOXYLAMINE,PYRIDOXINE

Background and Date of Approval

Doxylamine and pyridoxine is an established combination used primarily to treat nausea and vomiting during pregnancy (NVP), commonly referred to as morning sickness. Doxylamine is an antihistamine that reduces nausea through its antiemetic and sedative effects, while pyridoxine (vitamin B6) is a water-soluble vitamin that supports metabolic and neurological functions, with demonstrated benefit in reducing pregnancy-related nausea. This combination received U.S. FDA approval under the brand name Diclegis® in 2013 for use in pregnant women. In India, doxylamine and pyridoxine is available and prescribed by gynaecologists and general practitioners as a first-line treatment for nausea and vomiting in early pregnancy. It is regarded as safe and effective when used as directed.

Uses

Doxylamine, Pyridoxine is used for: Managing nausea and vomiting during pregnancy (morning sickness) Offering non-hormonal relief for early pregnancy discomfort Supporting nutritional balance with added Vitamin B6 Providing a safe antiemetic option when lifestyle changes are insufficient.

How is it administered?

This combination is usually available in oral tablet form. The commonly recommended dosage is one tablet at bedtime on the first day. If symptoms persist, the dose may be increased under medical supervision to a maximum of one tablet in the morning, one in the afternoon, and two at bedtime. Tablets should be swallowed whole and not crushed or chewed. It is advisable to take this medication on an empty stomach for best results. The dosage and duration should be strictly followed as per a doctor's advice.

Side Effects

Common Side Effects: Drowsiness Dry mouth Dizziness Headache Constipation Serious Side Effects: Blurred vision Mood changes (e.g., confusion or irritability) Difficulty urinating Irregular heartbeat Allergic reactions like rash, itching, or swelling Contact your doctor if any side effect worsens or doesn't go away.

Warnings

Not to be used in individuals with hypersensitivity to Doxylamine, Pyridoxine, or other antihistamines. Avoid use with other central nervous system depressants (e.g., alcohol, sedatives) due to increased drowsiness. Use with caution in patients with asthma, glaucoma, or urinary retention. May cause drowsiness; avoid driving or operating heavy machinery. Not suitable for use in children unless specifically prescribed.

Precautions

Inform your doctor about any underlying liver disorders, epilepsy, or chronic medication use before starting this supplement. Pregnant women should use it strictly under medical guidance. Avoid combining it with other sources of Vitamin B6 or sedative medications unless advised. Do not exceed the prescribed dose, as excess Pyridoxine may cause nerve-related side effects and excess Doxylamine may lead to increased sedation. Store in a cool, dry place away from children. If you notice symptoms like confusion, dry mouth, blurred vision, or tingling sensations, consult your doctor. Routine monitoring is not usually required, but regular follow-up is recommended during pregnancy to ensure both maternal and fetal well-being.

Word of Advice

Doxylamine and pyridoxine work most effectively when taken exactly as prescribed. Do not alter your dose or timing without consulting your doctor. Avoid concurrent use of additional sleep aids, allergy medications, or multivitamins containing vitamin B6 unless approved by your healthcare provider, as this may result in vitamin overdose or increased drowsiness. Maintain adequate hydration and refrain from activities requiring sustained focus until you understand how this medication affects you.

References

https://www.accessdata.fda.gov/drugsatfda_docs/label/2013/021876s002lbl.pdf https://www.medicines.org.uk/emc/files/pil.14892.pdf https://www.drugs.com/pro/doxylamine-and-pyridoxine.html

Frequently Asked Questions

What is Doxylamine, Pyridoxine used for?

Doxylamine, Pyridoxine.NPP is primarily used to treat nausea and vomiting during pregnancy, especially when simple lifestyle changes are not enough. It is one of the first-line medications prescribed for morning sickness and is considered safe when taken under medical supervision.

Is Doxylamine, Pyridoxine safe during early pregnancy?

Yes, Doxylamine, Pyridoxine.NPP is generally considered safe during the first trimester and beyond when prescribed by a healthcare professional. It has been approved by regulatory bodies like the FDA for managing nausea in pregnant women.

Can I take Doxylamine, Pyridoxine every day?

You can take it daily, but only under a doctor's guidance. It's important to follow the exact dose and timing prescribed to avoid side effects like extreme drowsiness or confusion.

Are there any foods or drinks to avoid while on this medicine?

Yes, you should avoid alcohol and caffeine, as they can worsen drowsiness or irritate your stomach. Also, avoid taking it with high-fat meals which may delay absorption.

How quickly does Doxylamine, pyridoxine work?

You may begin to notice relief from nausea within a few hours of taking the first dose. However, for best results, it is usually taken consistently for a few days as recommended by the doctor.

Written By: Muskan Patel, M.Pharm

Reviewed By: Dr. Vishwa Patel, MBBS