Unisom SleepTabs vs SleepGels for morning sickness

How do the options compare?

Options are stacked on five dimensions relevant to pregnancy use: mainstream OB guidance, pregnancy-specific evidence, dosing predictability, onset, and side-effect and interaction profile.

• Unisom SleepTabs are doxylamine succinate 25 mg per tablet, labeled as one tablet 30 minutes before going to bed, once daily. 1
• Unisom SleepGels are diphenhydramine HCl 50 mg per softgel, labeled for occasional sleeplessness at one softgel at bedtime, which is a different active ingredient from the SleepTabs line. 2
• Doxylamine succinate paired with pyridoxine hydrochloride has been studied in hundreds of thousands of pregnancies without an increased chance of birth defects. 3
• For diphenhydramine, a few studies have suggested a higher chance of birth defects with first-trimester use, but the studies do not all agree and no consistent pattern of birth defects has been noted. 4
• Doxylamine succinate 25 mg oral tablets are the over-the-counter sleep-aid strength, the half-life is 11.9 hours, and impaired vigilance and daytime drowsiness are known adverse effects that matter for driving. 5

Which option makes sense?

Options in this comparison can differ substantially in suitability. Please consult your healthcare provider to interpret the evidence, limitations, and cautions before choosing an option or changing your plan.

Disclosure: Pregnancy Smart offers a supplement that overlaps with one or more options above. This page describes the pregnancy evidence for each option on its own merits.