Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

43 questions · 43 findings · 8 reviews

No studies found 13 · 30.2%GRADE not reported 0 · 0%Very low 7 · 16.3%Low 17 · 39.5%Moderate 6 · 14%High 0 · 0%

N‐acetylcysteine vs placebo

Participants with at least some Side Effects · cannabis dependence

N‐acetylcysteine showed no clear difference in participants experiencing adverse effects compared with placebo (moderate certainty).

1 finding from 1 review

N‐acetylcysteine vs placebo

Withdrawals due to adverse events · cannabis dependence

N‐acetylcysteine showed no clear difference in participants withdrawn due to adverse effects compared with placebo (low certainty).

1 finding from 1 review

N‐acetylcysteine vs placebo

Completion of scheduled treatment · cannabis dependence

N‐acetylcysteine showed no clear difference in completion of scheduled treatment compared with placebo (moderate certainty).

1 finding from 1 review

Any antibiotic regimen plus N‐acetylcysteine vs the same regimen without N‐acetylcysteine (with or without placebo)

Eradication rate · patients with Helicobacter pylori infection

It is very uncertain whether any antibiotic regimen plus N‐acetylcysteine changes eradication rate compared with the same regimen without N‐acetylcysteine (with or without placebo) (very low certainty).

1 finding from 1 review

Any antibiotic regimen plus N‐acetylcysteine vs the same regimen without N‐acetylcysteine (with or without placebo)

Gastrointestinal adverse events · patients with Helicobacter pylori infection

It is very uncertain whether any antibiotic regimen plus N‐acetylcysteine changes gastrointestinal adverse events compared with the same regimen without N‐acetylcysteine (with or without placebo) (very low certainty).

1 finding from 1 review

Any antibiotic regimen plus N‐acetylcysteine vs the same regimen without N‐acetylcysteine (with or without placebo)

Allergic adverse events · patients with Helicobacter pylori infection

It is very uncertain whether any antibiotic regimen plus N‐acetylcysteine changes allergic adverse events compared with the same regimen without N‐acetylcysteine (with or without placebo) (very low certainty).

1 finding from 1 review

N‐acetylcysteine (1200 mg) vs placebo

QoL of participants living with SCD and their caregivers · sickle cell disease

It is very uncertain whether N‐acetylcysteine (1200 mg) changes qoL of participants living with SCD and their caregivers (measured… compared with placebo (very low certainty).

1 finding from 1 review

Intervention not reported

Clinical pregnancy; type of antioxidant (natural conceptions and undergoing fertility treatments) ‐ N‐acetylcysteine versus L‐carnitine№ of participants: 164(1 RCT) · women with subfertility

It is very uncertain whether the intervention changes clinical pregnancy; type of antioxidant (natural conceptions and… (very low certainty).

1 finding from 1 review