Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,133 questions · 1,153 findings · 36 reviews · Skin

No studies found 407 · 35.3%GRADE not reported 90 · 7.8%Very low 183 · 15.9%Low 209 · 18.1%Moderate 211 · 18.3%High 53 · 4.6%

Oral aciclovir (short‐term) vs placebo

Incidence of herpes labialis after use of the preventative intervention · participants with recurrent herpes labialis

Oral aciclovir (short‐term) showed no clear difference in incidence of herpes labialis during use of the preventative… compared with placebo (moderate certainty).

1 finding from 1 review

Valaciclovir (short‐term) vs placebo

Incidence of herpes labialis after use of the preventative intervention · participants with recurrent herpes labialis

Valaciclovir (short‐term) showed no clear difference in incidence of HSL during use of the preventative intervention (by… compared with placebo (moderate certainty).

1 finding from 1 review

Valaciclovir (short‐term) vs placebo

Incidence of HSL during use of the preventative intervention (by culture) · participants with recurrent herpes labialis

Valaciclovir (short‐term) showed no clear difference in incidence of HSL during use of the preventative intervention (by… compared with placebo (moderate certainty).

1 finding from 1 review

Valaciclovir (short‐term) vs placebo

Adverse effects during use of the preventative intervention · participants with recurrent herpes labialis

Valaciclovir (short‐term) showed no clear difference in adverse effects during use of the preventative intervention compared with placebo (moderate certainty).

1 finding from 1 review