You should consult you doctor if you feel you are disproportionately unwell, deteriorating fast or in a high risk group as detailed in the following link 


FULL INFORMATION HERE:

http://www.patient.co.uk/showdoc/230687​

Aspirin

Up to 400 mg three times daily

Same as for aspirin

Paracetamol

Doses of Medication Children under 12 yr

Not advised below 12 years. 

Ibuprofen is licensed from 3 months and dosing details from box or pharmacist.

Antibiotic use in flu-like illnesses

Flu

Paracetamol

Consult your local practice

Doses of Medication Children over 12 yr and Adults

2 X 500 mg tablets four times daily

**Please read the packet of other cold and flu remedies to check there contents and ensure you do not exceed a maximum 24 hour dose of paracetamol**

Note that the most effective ingredient in many “flu remedies” is the paracetamol and buying it on its own from a chemist (or elsewhere) is usually much cheaper than combination medications.

Below is a link to excellent information about this illness, which makes you feel so unwell. However, the following information clarifies some points within the leaflet:

Influenza and associated illnesses are caused by viruses. This means that antibiotics have no effect on the flu illness itself.

Uncommonly an individual may get a secondary infection with a bacterium that requires antibiotics. However, the majority of people require no specific treatment beyond the above for symptom-relief.

Aspirin

Up to 3 X 300 mg tablets four times daily

Do not mix Aspirin with other medicines such as Ibuprofen, Nurofen, Diclofenac, Voltarol – if in doubt discuss with a pharmacist.

Certain groups such as those with Asthma, Bowel Disease, Stomach Ulcers/Acid Problems or Kidney disease may be advised not to take this medication and should discuss it with a pharmacist or doctor.

Flu & flu-like illness

Ibuprofen

Is licensed from birth and can bought over the counter for children.

The box gives clear guidance on doses dependant on the strength of preparation you buy.