For a 3-year-old child, the safe dose of paracetamol depends on the child's weight rather than age alone. Typically, the dose is about 10-15 mg per kilogram of body weight every 4 to 6 hours, not exceeding 4 doses in 24 hours.

Crocin drops usually contain 125 mg of paracetamol per 5 ml, not 500 mg. The 500 mg strength is generally for adult tablets, not drops for children.

Giving 5 ml of Crocin drops (which is about 125 mg) is usually safe for a 3-year-old child, but you should confirm the exact concentration on the bottle. Never exceed the recommended dose.

If you are unsure about the correct dose or the concentration of the medicine, consult your pediatrician before administering it.

Important:

• Always use the measuring device that comes with the medicine.
• Avoid giving adult formulations to children.
• If the child has liver problems or other health issues, seek medical advice before giving paracetamol.

If the child has a fever or pain, paracetamol is generally safe when dosed correctly, but professional guidance is best to ensure safety and effectiveness.

Please consult a pediatrician for personalized advice and dosing.