What do systematic reviews say?

Paracetamol 1000 mg vs placebo

• Paracetamol (acetaminophen) for acute treatment of episodic tension‐type headache in adults 2016 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  Moderate

Combined paracetamol plus ibuprofen in a single tablet (e.g. paracetamol 1000 mg/ibuprofen 400 mg or 500/200 mg) vs Single drugs given separately (paracetamol 1000 mg or ibuprofen 400 mg)

• Ibuprofen and/or paracetamol (acetaminophen) for pain relief after surgical removal of lower wisdom teeth 2013 · Cochrane All outcomes

  Study period (immediate postoperative)
  The majority of adverse events were minor in nature and usually included nausea, vomiting, headaches and dizziness. Side effect profiles have not been included in a meta-analysis as multiple adverse events were…
  2 studies
  GRADE not reported

Oral paracetamol vs placebo

Paracetamol (single oral dose, any dose or formulation; subgroups up… showed no clear difference in patients with one or more adverse events compared with placebo; GRADE not reported.

• Paracetamol for pain relief after surgical removal of lower wisdom teeth 2007 · Cochrane All outcomes

  up to 7 days
  RR 1.19 [0.90, 1.57]
  17 studies · 1645 participants
  GRADE not reported