Alternatives to Diclegis If You Can't Fill Your Prescription

Diclegis (doxylamine succinate 10 mg / pyridoxine hydrochloride 10 mg) is the only FDA-approved medication specifically indicated for nausea and vomiting of pregnancy (NVP). But if your pharmacy is out of stock, the cost is a barrier, or your insurance won't cover it, you have options. Here are the best alternatives to Diclegis for morning sickness in 2026 — always discuss any switch with your OB/GYN or midwife before making a change.

Option 1: Generic Doxylamine/Pyridoxine (Same Drug, Lower Cost)

The first thing to try is the generic version of Diclegis: doxylamine succinate / pyridoxine hydrochloride delayed-release 10 mg/10 mg. This is FDA-approved as therapeutically equivalent to brand-name Diclegis. It contains the same active ingredients in the same formulation and dosage. The difference? Cost. With a GoodRx or SingleCare coupon, the generic can cost as little as $45–$80 for 60 tablets, compared to $286–$423 for brand-name Diclegis.

Best for: Anyone who wants the same medication at a fraction of the price.

Option 2: Bonjesta (Higher-Dose Version of the Same Combination)

Bonjesta (doxylamine 20 mg / pyridoxine 20 mg extended-release) is also FDA-approved for NVP and uses the same active ingredients as Diclegis, just at double the dose per tablet. The key advantage is convenience — you take 1–2 tablets per day instead of up to 4 with Diclegis. The major downside: Bonjesta is brand-name only with no generic until at least 2033, and it costs approximately $481–$490 for 30 tablets. Most plans require prior authorization for Bonjesta.

Best for: Women who have adequate relief from doxylamine/pyridoxine but struggle with adherence to a 4-tablet-per-day regimen.

Option 3: OTC Doxylamine + Vitamin B6 (Budget Option)

Unisom SleepTabs (doxylamine succinate 25 mg) cut in half (to get approximately 12.5 mg) combined with an over-the-counter vitamin B6 (pyridoxine) supplement is a common recommendation when Diclegis isn't available. However, important caveats apply: Unisom SleepTabs are not the same delayed-release formulation as Diclegis, the dose isn't exactly equivalent, and this combination has not been studied for fetal safety with Pregnancy Category A rigor. Use this approach only with your doctor's guidance.

Best for: Short-term bridge while waiting for a Diclegis prescription to be filled, under provider guidance only.

Option 4: Ondansetron (Zofran) — Second-Line Prescription

Ondansetron (generic Zofran) is a serotonin 5-HT3 receptor antagonist used off-label for pregnancy nausea. It works through a completely different mechanism than Diclegis — blocking serotonin signals rather than histamine. ACOG considers it a second-line option when first-line treatments like doxylamine/pyridoxine fail. Generic ondansetron costs approximately $10–$30 for a typical prescription. Some studies have raised questions about very early first-trimester use; discuss the timing with your provider.

Best for: Women who need non-drowsy nausea relief or haven't responded to doxylamine/pyridoxine.

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Option 5: Promethazine (Phenergan) — Off-Label Second-Line

Promethazine (Phenergan) is a first-generation antihistamine used off-label for pregnancy nausea. It causes strong sedation, which can actually help with nighttime nausea and insomnia. It's an FDA Pregnancy Category C drug (unlike Diclegis's Category A) and is generally reserved for cases where first-line treatment has failed. Generic promethazine is very affordable at approximately $5–$20 for a typical supply.

Best for: Women with severe nausea who also struggle with nighttime insomnia.

Option 6: Metoclopramide (Reglan) — For Severe Cases

Metoclopramide (Reglan) is a dopamine antagonist and prokinetic agent that speeds stomach emptying. It's used off-label for NVP, typically as a second- or third-line agent. Long-term use (over 12 weeks) carries a risk of tardive dyskinesia (a movement disorder), so it's generally reserved for severe or refractory cases. It's FDA Pregnancy Category B.

Best for: Women with severe NVP who haven't responded to other treatments, under close provider supervision.

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Non-Medication Strategies to Try Alongside Any Treatment

Eat small, frequent meals (5–6 per day) to keep your stomach from emptying

Keep crackers at your bedside to eat before getting up in the morning

Avoid smells and foods that trigger nausea

Ginger (ginger tea, ginger candies) may provide mild nausea relief

Stay well hydrated throughout the day

The Bottom Line

The generic version of Diclegis is your best first alternative — same drug, same effectiveness, dramatically lower cost. If you're still struggling to find it, see our guide on how to find Diclegis in stock near you and how to save money on Diclegis. Always talk to your OB/GYN before switching medications during pregnancy.