Diphenhidramine (Benadryl) Dose Chart

Diphenhidramine (Benadryl) Dosage (ANTIHISTAMINE)
Weight Liquid 12.5mg/5ml (tsp) Chewable 12.5mg Capsules 25mg
17-21 lbs ¾ tsp = 3.75 ml Use liquid Use liquid
22-32 lbs 1 tsp = 5 ml 1 chew tabs Use liquid
33-42 lbs 1 ½ tsp = 7.5 ml 1 ½ chew tabs Use liquid
43-53 lbs 2 tsp = 10 ml 2 chew tabs 1 tab/cap
54-64 lbs 2 ½ tsp = 12.5 ml 2 ½ chew tabs  
65-75 lbs 3 tsp = 15 ml 3 chew tabs  
76-86 lbs 3 ½ tsp = 17.5 ml 3 ½ chew tabs  
>86 lbs 4 tsp = 20 ml 4 chew tabs 2 tabs/caps

• Diphenhidramine (Benadryl) Dosage: determine by finding your child’s weight in the top row of the dosage table.
• Adult dose: 50 mg.
• Repeat every 6-8 hours as needed.
• Don’t use under 1 year of age (reason: it’s a sedative).