Dramamine’s most common side effects are drowsiness, dry mouth, and dizziness. These are generally mild and don’t require medical attention, but the drug can also cause more serious reactions in certain situations, especially at higher doses or in older adults. The side effects you experience depend partly on which Dramamine formula you’re taking, since the brand now covers three distinct products with different active ingredients.
The Most Common Side Effects
Original Dramamine contains dimenhydrinate, an antihistamine that works by dampening signals from your inner ear’s balance system and suppressing the brain’s vomiting center. That same mechanism affects other parts of your nervous system, which is why side effects tend to show up as general sedation and slowed-down body functions.
The side effects that most people notice include:
- Drowsiness, reported by about 13% of users
- Dizziness
- Dry mouth
- Constipation
- Confusion
- Fatigue, reported by about 7% of users
These typically don’t need medical attention and fade as the drug leaves your system. You should take Dramamine 30 to 60 minutes before travel, and the sedating effects can linger for several hours after that. Plan accordingly if you need to drive or do anything requiring focus.
Serious Reactions to Watch For
A smaller number of people experience side effects that warrant a call to a doctor. These include sudden eye pain or changes in vision (blurriness, halos around lights, or vision loss), difficulty urinating, and signs of an allergic reaction like hives, skin rash, or swelling of the face, lips, tongue, or throat.
Overdose presents a more dangerous picture. Taking too much dimenhydrinate can cause hallucinations, seizures, delirium, agitation, tremors, rapid heartbeat, and dangerously low blood pressure. Deaths from antihistamine overdose are rare, but serious heart rhythm disturbances can occur and are the primary life-threatening risk. Stick to no more than 8 tablets (400 mg) in 24 hours for adults, and significantly less for children.
Mixing Dramamine With Alcohol or Sedatives
Alcohol amplifies Dramamine’s sedating effects. Combining the two increases drowsiness and dizziness beyond what either substance causes alone, which can impair your coordination and judgment enough to make driving or even walking dangerous. The same applies to other sedating medications: sleep aids, anti-anxiety drugs, opioid painkillers, and other antihistamines all compound the drowsiness. If you’re already taking something that makes you sleepy, adding Dramamine on top creates a stacking effect on your central nervous system.
Risks for Older Adults
Dimenhydrinate appears on the American Geriatrics Society’s Beers Criteria, a widely used list of medications considered potentially inappropriate for adults over 65. The specific concerns are confusion, cognitive impairment, and delirium. Older adults metabolize antihistamines more slowly, so the drug’s effects on the brain are stronger and last longer. The dizziness and unsteadiness also raise the risk of falls, which can be a serious problem in this age group.
Side Effects During Pregnancy and Breastfeeding
Dimenhydrinate carries an FDA pregnancy category B rating, meaning animal studies at doses up to 25 times the human dose showed no evidence of fetal harm, and clinical studies in pregnant women haven’t indicated increased risk of abnormalities in any trimester. That said, the drug crosses the placenta and may have effects on uterine contractions, so its safety during labor specifically hasn’t been established.
The drug does pass into breast milk. Small, occasional doses are not expected to cause problems in a breastfed infant. Larger or more frequent doses could cause side effects in the baby or reduce milk supply, particularly in the early weeks before breastfeeding is well established. Taking a single dose at bedtime after the last feeding of the day minimizes exposure.
How Side Effects Differ by Formula
The Dramamine brand now sells three products that work quite differently from one another.
Original Dramamine (dimenhydrinate) is the classic formula and the most sedating. Drowsiness is the trade-off for its effectiveness against motion sickness. It’s taken every 4 to 6 hours.
Dramamine Less Drowsy contains meclizine, a different antihistamine. Despite the name, user-reported drowsiness rates for meclizine are actually higher (around 21%) than for dimenhydrinate (around 13%). The “less drowsy” branding likely reflects the longer dosing interval and the fact that meclizine has a 6-hour half-life, which can spread the sedation more evenly rather than hitting hard all at once. The side effect profile is otherwise similar: dizziness, dry mouth, fatigue.
Dramamine Non-Drowsy Naturals is a ginger supplement, not an antihistamine at all. Its side effects are fundamentally different and much milder. The most common issues are heartburn, diarrhea, stomach discomfort, and burping. Allergic reactions are possible but rare. Because it’s not acting on your nervous system, it doesn’t cause the drowsiness, dry mouth, or confusion associated with the other two formulas. The trade-off is that it’s less potent for severe motion sickness.
Children’s Dosing and Side Effects
Children experience the same side effects as adults but are more vulnerable to overdose because of their smaller body size. The maximum daily limits drop sharply by age: children 6 to 11 can take no more than 3 tablets (150 mg) in 24 hours, spaced every 6 to 8 hours. Children 2 to 5 are limited to 1.5 tablets (75 mg) per day. Dramamine is not recommended for children under 2 without a doctor’s guidance. Drowsiness and confusion are the side effects most likely to concern parents, and both are dose-dependent.