Bonjesta XR Drug Interactions: What to Avoid and What to Tell Your Doctor

Knowing What Interacts With Bonjesta Can Keep You and Your Baby Safe

When you're pregnant and taking medication, every interaction matters. Bonjesta is one of the safest FDA-approved options for morning sickness, but like all medications, it can interact with other drugs, supplements, and even certain foods.

This guide covers the most important Bonjesta drug interactions you should know about — so you can have an informed conversation with your doctor and avoid potential problems.

How Drug Interactions Work

A drug interaction happens when one substance changes how another works in your body. Interactions can:

• Increase side effects — Two sedating medications taken together can cause extreme drowsiness
• Reduce effectiveness — One drug may interfere with how another is absorbed or processed
• Create dangerous combinations — Some combinations can cause serious or life-threatening reactions

Bonjesta's main interaction risks come from its antihistamine component, doxylamine, which causes drowsiness and has anticholinergic (drying) effects. Combining it with other medications that share these properties can amplify the effects.

Medications That Interact With Bonjesta

Major Interactions — Do Not Combine

The following interactions are serious and potentially dangerous. Tell your doctor immediately if you take any of these:

MAO Inhibitors (Monoamine Oxidase Inhibitors)

This is the most critical interaction. You should not take Bonjesta if you have used an MAO inhibitor within the past 14 days. The combination can cause a dangerous increase in the effects of both medications.

MAO inhibitors include:

• Isocarboxazid (Marplan)
• Phenelzine (Nardil)
• Tranylcypromine (Parnate)
• Rasagiline (Azilect)
• Selegiline (Eldepryl, Emsam, Zelapar)
• Linezolid (Zyvox) — an antibiotic that also has MAO-inhibiting properties
• Methylene blue injection — used in certain medical procedures

If you've taken any MAO inhibitor in the last 14 days, you must wait before starting Bonjesta. This is a contraindication, not just a precaution.

CNS Depressants (Central Nervous System Depressants)

Bonjesta already causes drowsiness. Combining it with other CNS depressants can cause extreme sedation, impaired coordination, slowed breathing, or falls. Medications in this category include:

• Opioid pain medications — Oxycodone (OxyContin, Percocet), Hydrocodone (Vicodin, Norco), Codeine, Tramadol (Ultram)
• Benzodiazepines — Alprazolam (Xanax), Lorazepam (Ativan), Diazepam (Valium), Clonazepam (Klonopin)
• Sleep aids — Zolpidem (Ambien), Eszopiclone (Lunesta), Suvorexant (Belsomra)
• Muscle relaxers — Cyclobenzaprine (Flexeril), Methocarbamol (Robaxin), Tizanidine (Zanaflex)
• Certain antidepressants and anti-anxiety medications — Particularly those with sedating effects
• Anti-seizure medications — Some, like Gabapentin (Neurontin) and Pregabalin (Lyrica), have CNS depressant properties

If you need any of these medications during pregnancy, your doctor will weigh the risks and benefits carefully. Never combine them with Bonjesta without your doctor's knowledge.

Moderate Interactions — Use Caution

Other Antihistamines

Taking Bonjesta with other antihistamines doubles up on the same type of medication, increasing drowsiness and anticholinergic side effects. Avoid combining Bonjesta with:

• Diphenhydramine (Benadryl) — commonly used for allergies and sleep
• Dimenhydrinate (Dramamine) — used for motion sickness
• Chlorpheniramine, Cetirizine (Zyrtec), Loratadine (Claritin) — allergy medications

If you need an allergy medication while taking Bonjesta, talk to your doctor about the safest option. Non-sedating antihistamines like Loratadine (Claritin) are less likely to compound drowsiness, but you should still check with your provider.

Anticholinergic Medications

Doxylamine already has anticholinergic effects (dry mouth, blurred vision, constipation, difficulty urinating). Adding other anticholinergic medications increases these effects. Common anticholinergic medications include:

• Oxybutynin (Ditropan) — for overactive bladder
• Scopolamine — for motion sickness
• Certain antidepressants — Tricyclic antidepressants like Amitriptyline (Elavil) and Nortriptyline (Pamelor)

Supplements and Over-the-Counter Medications to Watch

Just because something is "natural" or over the counter doesn't mean it's safe to combine with Bonjesta:

• Additional vitamin B6 supplements — Bonjesta already contains 20–40 mg of pyridoxine (vitamin B6) per day. Taking extra B6 supplements on top of this can lead to excessive intake. While B6 toxicity is rare at normal doses, it's best to tell your doctor about any supplements you're taking.
• Unisom SleepTabs (doxylamine) — This is the same antihistamine that's in Bonjesta. Taking both would effectively double your doxylamine dose and significantly increase drowsiness.
• Benadryl (Diphenhydramine) — Another antihistamine that amplifies drowsiness and anticholinergic effects when combined with Bonjesta.
• Sleep supplements containing melatonin or valerian — These can add to the sedating effects of Bonjesta. Check with your doctor before combining.
• Cold and flu medications — Many contain antihistamines (like Diphenhydramine or Doxylamine) or other sedating ingredients. Always read the label and ask your pharmacist before taking any cold medication while on Bonjesta.

Food and Drink Interactions

Alcohol

Avoid alcohol completely while taking Bonjesta. Alcohol is a CNS depressant that significantly increases drowsiness and impairment when combined with doxylamine. Alcohol should already be avoided during pregnancy, but this interaction makes it doubly important.

Food Timing

Bonjesta should be taken on an empty stomach with a full glass of water. Food can affect the absorption and release profile of the dual-layer tablet. Taking it with a meal may delay or reduce its effectiveness.

What to Tell Your Doctor

Before starting Bonjesta, make sure your doctor knows about:

• All prescription medications you're currently taking — even if prescribed by a different doctor
• Over-the-counter medications — including allergy meds, sleep aids, pain relievers, and cold/flu products
• Vitamins and supplements — especially vitamin B6, prenatal vitamins (which contain B6), and herbal supplements
• Any MAO inhibitors you've taken in the past 14 days
• Medical conditions — particularly asthma, glaucoma, GI obstruction, stomach ulcers, or bladder problems

Your pharmacist is also an excellent resource. When you fill your Bonjesta prescription, ask them to check for interactions with everything else you're taking. Most pharmacies do this automatically, but it never hurts to double-check.

Final Thoughts

Bonjesta is a safe and effective medication for morning sickness when used as directed, but being aware of drug interactions is an important part of using it safely — especially during pregnancy.

The biggest things to remember: never combine Bonjesta with MAO inhibitors, be cautious with other sedating medications, skip the extra antihistamines, and tell your doctor about everything you're taking.

For more information on Bonjesta's side effects, dosage, and savings options, check out our other Bonjesta guides. And if you need help finding it at a pharmacy, Medfinder can show you where it's in stock near you.