Preoperative medication to inhibit secretions and salivation (blocks action of acetylcholine and antagonizes histamine and serotonin)
Neonates and children:
<5 kg: 0.2 mg/kg 30 min preoperatively, then q 4–6 hr.
>5 kg: 0.1–0.2 mg/kg/dose (max: 0.4 mg/dose).
Adults: 0.4–0.6 mg IV or SC 30 min preoperatively

Treatment of sinus bradycardia. 

Neonates and children: 0.02 mg/kg (minimum: 0.1 mg); IV or intratracheal (max: 0.5 mg); may repeat 5 min later, 1×
Adults: 0.5–1 mg q 5 min (max total dose: 2 mg)

Antidote to organophosphate poisoning
0.02–0.05 mg/kg q 10–20 min until atropine effect (tachycardia, mydriasis, fever), then q 1–4 hr for at least 24 hr.

Beyaz Hastane