Taking 300mg of Benadryl (diphenhydramine) is a significantly higher dose than the recommended amount and can lead to serious health risks. The typical recommended dose of Benadryl for adults is 25-50mg every 4-6 hours, not to exceed 300mg in 24 hours.
Taking 300mg of Benadryl may cause an overdose, and symptoms can vary from mild to severe. Some potential effects of an overdose include:
- Extreme drowsiness or sedation
- Confusion or disorientation
- Blurred vision
- Dry mouth
- Rapid heartbeat or irregular heart rhythm
- Difficulty breathing
- Seizures
- Hallucinations
- Unconsciousness
An overdose of Benadryl can be life-threatening, particularly if combined with other medications or substances that depress the central nervous system, like alcohol or certain pain medications.
If you or someone else accidentally takes an excessive dose of Benadryl, it is essential to seek immediate medical attention. Call your local emergency number or go to the nearest emergency room. If you're in the United States, you can contact Poison Control at 1-800-222-1222 for guidance.
Remember, it's crucial to take medications only as prescribed or as directed by a healthcare professional. If you have concerns about the appropriate dosage or side effects of Benadryl, consult your doctor or a pharmacist for personalized advice.