Dimenhydrinate (Dramamine): What It Is and How It's Used for Motion Sickness
Educational summary · drug class: First-generation (sedating) antihistamine (H1-receptor antagonist with anticholinergic activity); OTC antiemetic · last reviewed 2026-06-29
Dimenhydrinate, sold over the counter in the US as Dramamine Original Formula, is a first-generation (sedating) antihistamine used to help prevent and reduce the nausea, vomiting, and dizziness of motion sickness. Its label notes that marked drowsiness may occur, so it is not non-drowsy. Availability, brands, and pack sizes vary by country, and whether it's right for you is a question for your doctor or pharmacist.
Not medical advice. This page is for general educational and informational purposes only. It is not medical advice and is not a substitute for the advice of a qualified healthcare professional. Dizzout is not a medical provider — we are not doctors or pharmacists. The information here is a general summary drawn from sources such as the FDA-approved label and other public health resources, and it may not reflect the most current changes; the official product label is the authoritative source. Whether any medicine is right for you, and how much to take, are individual decisions that depend on your health, age, and other medicines. We do not provide dosing instructions — always read the product label and follow its directions. Talk to your doctor or pharmacist before starting, stopping, or changing any medication, and never disregard or delay professional medical advice because of something you read here. If you think you may have a medical emergency, contact a doctor or your local emergency number immediately.
What it is
Dimenhydrinate is a first-generation, sedating antihistamine (an H1-receptor antagonist with anticholinergic activity) that is classified on the OTC Drug Facts label as an antiemetic. It is a salt combining diphenhydramine with 8-chlorotheophylline. In the US it is sold over the counter, most familiarly as Dramamine Original Formula; other names include Driminate, Travtabs, Triptone, and (in Canada) Gravol. In the UK, the over-the-counter travel-sickness market is dominated by hyoscine and other antihistamines rather than Dramamine-branded dimenhydrinate, so check the product available where you live.
Availability: OTC in the US (e.g., Dramamine Original Formula); availability and brands vary by country. Legal status, brand names, and availability vary by country — check what applies where you live.
How it may help with motion sickness
Motion sickness happens when balance signals from the inner ear (vestibular system) conflict with what your eyes and body sense. According to MedlinePlus, dimenhydrinate 'works by preventing problems with body balance.' Through its antihistamine and anticholinergic action it crosses into the brain and dampens overactive inner-ear signaling and the brain's nausea and vomiting response, which reduces the nausea, vomiting, and dizziness of motion sickness.
General timing
The OTC Drug Facts label directs taking the first dose about 30 to 60 minutes before travel or the activity, with later doses at set intervals up to a stated daily maximum. This is general label timing only. We do not provide dosing instructions — follow the directions on the product label or the advice of your doctor or pharmacist.
We don't provide dosing instructions. The exact amount, schedule, and whether it suits you are individual decisions — read the product label and follow its directions, and ask a doctor or pharmacist.
Common side effects
Sources such as the product label commonly list:
- Drowsiness or marked sleepiness (the label warns marked drowsiness may occur)
- Dizziness
- Dry mouth, nose, and throat
- Headache
- Blurred vision
- Constipation or difficulty urinating
- Excitability or restlessness, especially in children
Who should check with a doctor or pharmacist first
- Causes drowsiness; the label warns to be careful driving or operating machinery until you know how it affects you.
- Avoid alcohol, sedatives, and tranquilizers, which can add to drowsiness and dizziness.
- Pregnancy or breastfeeding: the label says to ask a doctor before use.
- Children: do not give to children under 2 except on a doctor's advice; use only age-appropriate products.
- Older adults: first-generation antihistamines are flagged on Beers-type criteria as potentially inappropriate in adults 65+; consult a clinician.
- Ask a doctor before use if you have breathing problems (asthma, chronic bronchitis, emphysema), glaucoma, or trouble urinating from an enlarged prostate.
- May interact with other sedating drugs, anticholinergics, and certain antidepressants; tell your doctor or pharmacist about all medicines and supplements.
- Some chewable forms contain aspartame (phenylalanine), relevant for people with phenylketonuria (PKU).
Frequently asked questions
Does dimenhydrinate (Dramamine) make you drowsy?+
Yes — it is a first-generation, sedating antihistamine, and its label warns that marked drowsiness may occur. It is not a non-drowsy product. The label advises caution with driving or operating machinery until you know how it affects you.
When is dimenhydrinate usually taken for motion sickness?+
The OTC label generally directs taking the first dose about 30 to 60 minutes before travel, with later doses at set intervals up to a daily maximum. We don't give dosing instructions — follow the product label or ask your pharmacist.
Is Dramamine available over the counter everywhere?+
No. In the US it is sold over the counter, and in Canada it is widely available as Gravol, but availability and brand names vary by country (for example, the UK travel-sickness market leans on hyoscine and other antihistamines). Check the product sold where you are.
Can children take dimenhydrinate?+
The label advises not giving it to children under 2 except on a doctor's advice, and using only age-appropriate products and amounts for older children. Talk to a pediatrician or pharmacist before giving it to a child.
Sources
Related
This page is for general educational and informational purposes only. It is not medical advice and is not a substitute for the advice of a qualified healthcare professional. Dizzout is not a medical provider — we are not doctors or pharmacists. The information here is a general summary drawn from sources such as the FDA-approved label and other public health resources, and it may not reflect the most current changes; the official product label is the authoritative source. Whether any medicine is right for you, and how much to take, are individual decisions that depend on your health, age, and other medicines. We do not provide dosing instructions — always read the product label and follow its directions. Talk to your doctor or pharmacist before starting, stopping, or changing any medication, and never disregard or delay professional medical advice because of something you read here. If you think you may have a medical emergency, contact a doctor or your local emergency number immediately.