This is poisoning from taking an excessive amount of dimenhydrinate, a type of antihistamine.

Dimenhydrinate

Dimenhydrinate is an ingredient found in some allergy medicines, as well as medicines used to treat nausea and vomiting.

It may be found in:

• Calm-X
• Dimetabs
• Dramamine
• Gravol
• Hydrate bullet
• Marmine
• Nico-Vert
• Triptone

Heart and blood

• Rapid heartbeat
• Low blood pressure

Gastrointestinal

• Anorexia
• Dry lining of the stomach and intestines

Lungs

• Breathing difficulty

Nervous system

• Depression
• Excitation
• Drowsiness
• Nervousness
• Hallucinations
• Disorientation
• Delirium
• Unsteadiness
• Tremor
• Convulsions
• Seizures
• Unconsciousness

Determine the following information:

• Patient's age, weight, and condition
• Name of the product (ingredients and strengths, if known)
• Time it was swallowed
• Amount swallowed
• If the medicine was prescribed for the patient

The National Poison Control Center (1-800-222-1222) can be called from anywhere in the United States. This national hotline number will let you talk to experts in poisoning. They will give you further instructions.

This is a free and confidential service. All local poison control centers in the U.S. use this national number. You should call if you have any questions about poisoning or poison prevention. It does NOT need to be an emergency. You can call for any reason, 24 hours a day, 7 days a week.

Take the container with you to the hospital, if possible.

See National Poison Control center.

The health care provider will measure and monitor the patient's vital signs, including temperature, pulse, breathing rate, and blood pressure.

The patient may receive:

• Medicines to treat symptoms
• Medicines to make the person throw up
• Activated charcoal
• A nasogastric (NG) tube thru the nose into the stomach to empty the stomach (gastric lavage)   

If the patient survives the first 24 hours, a good recovery is likely. Few patients actually die from an antihistamine overdose.