Dose calculator · Ibuprofen

Junifen dose calculator by weight

Every weight from 5 to 40 kg, in milligrams and in millilitres according to the strength of your bottle. Fixed table from the AEPap dosing guide — no AI. Always check the strength printed on your own bottle: it changes by country and by presentation.

Medicine (generic or brand)

Weight (kg)

Age

Or type what your bottle says (optional)

Junifen 20 mg/ml or Junifen 40 mg/ml: not the same thing

Junifen comes in 2 strengths. The 40 mg/ml one has 2 times as much ibuprofen in each millilitre as the 20 mg/ml one: the same millilitres give 2 times the dose.

For a 10 kg child (100 mg):

Junifen 20 mg/ml (2 % (100 mg/5 ml))5 ml
Junifen 40 mg/ml (4 % (200 mg/5 ml))2.5 ml

⚠️ Before measuring, look at how many mg per ml the box says. It is the most common way to get a dose wrong at home.

Every 6–8 hours, and never more doses in 24 hours than the last column says.

Weight	Dose	2 % (100 mg/5 ml)	4 % (200 mg/5 ml)	Max. / 24 h
5 kg	50 mg	2.5 ml	1.2 ml	3
6 kg	60 mg	3 ml	1.5 ml	3
7 kg	70 mg	3.5 ml	1.7 ml	3
8 kg	80 mg	4 ml	2 ml	3
9 kg	90 mg	4.5 ml	2.2 ml	3
10 kg	100 mg	5 ml	2.5 ml	3
11 kg	110 mg	5.5 ml	2.7 ml	3
12 kg	120 mg	6 ml	3 ml	3
13 kg	130 mg	6.5 ml	3.2 ml	3
14 kg	140 mg	7 ml	3.5 ml	3
15 kg	150 mg	7.5 ml	3.7 ml	3
16 kg	160 mg	8 ml	4 ml	3
17 kg	170 mg	8.5 ml	4.2 ml	3
18 kg	180 mg	9 ml	4.5 ml	3
19 kg	190 mg	9.5 ml	4.7 ml	3
20 kg	200 mg	10 ml	5 ml	3
21 kg	210 mg	10.5 ml	5.2 ml	3
22 kg	220 mg	11 ml	5.5 ml	3
23 kg	230 mg	11.5 ml	5.7 ml	3
24 kg	240 mg	12 ml	6 ml	3
25 kg	250 mg	12.5 ml	6.2 ml	3
26 kg	260 mg	13 ml	6.5 ml	3
27 kg	270 mg	13.5 ml	6.7 ml	3
28 kg	280 mg	14 ml	7 ml	3
29 kg	290 mg	14.5 ml	7.2 ml	3
30 kg	300 mg	15 ml	7.5 ml	3
31 kg	310 mg	15.5 ml	7.7 ml	3
32 kg	320 mg	16 ml	8 ml	3
33 kg	330 mg	16.5 ml	8.2 ml	3
34 kg	340 mg	17 ml	8.5 ml	3
35 kg	350 mg	17.5 ml	8.7 ml	3
36 kg	360 mg	18 ml	9 ml	3
37 kg	370 mg	18.5 ml	9.2 ml	3
38 kg	380 mg	19 ml	9.5 ml	3
39 kg	390 mg	19.5 ml	9.7 ml	3
40 kg	400 mg	20 ml	10 ml	3

⚠️ The grey rows are below the minimum weight for Ibuprofen: do not give it without medical advice. Under 3 months, no medicine without a prescription. Ibuprofen is also avoided if the child is dehydrated (vomiting, diarrhoea) or has chickenpox.

The guide publishes a band of 5–10 mg/kg per dose. This table uses 10 mg/kg: it is the dose the published daily maximum is built from, and the one the manufacturers' leaflets give. A lower dose within the band is also correct.

Not under 3 months or under 5 kg. Give with food. Avoid if dehydrated (vomiting/diarrhoea), with chickenpox, or with kidney problems.

AEPap — Guía rápida de dosificación práctica en pediatría (3.ª ed.), tabla analgésicos/antitérmicos.

What parents ask about Junifen

How much Junifen for a child of 10, 15 or 20 kg?

The dose goes by weight, never by age alone. For Junifen:

10 kg 100 mg2 % (100 mg/5 ml): 5 ml4 % (200 mg/5 ml): 2.5 ml
15 kg 150 mg2 % (100 mg/5 ml): 7.5 ml4 % (200 mg/5 ml): 3.7 ml
20 kg 200 mg2 % (100 mg/5 ml): 10 ml4 % (200 mg/5 ml): 5 ml

How often, and how many times a day?

Every 6–8 hours. For a child of 15 kg that is at most 3 doses in 24 hours.

What if I don't know what the child weighs?

Age is not enough: two children of the same age can be several kilos apart, and this dose is calculated per kilo. Weigh the child, or ask at the pharmacy. PediBot will not give a figure from age alone.

From what age can Junifen be given?

Not before 3 months, and not under 5 kg. Not under 3 months or under 5 kg. Give with food. Avoid if dehydrated (vomiting/diarrhoea), with chickenpox, or with kidney problems.

The same medicine under other names

In Spain, this is also sold as Dalsy and Apirofeno. Different box, same molecule and the same dose per kilo — what changes is the strength printed on the bottle, so always read it.

Sold in Spain.

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