About tuberculin ppd
Tuberculin skin test antigen
Used for
- Helps detect tuberculosis infection by measuring a delayed skin reaction.
Usual adult dose
Inject 0.1 mL intradermally once; trained staff read the reaction after 48–72 hours.
Usual dose in children
Inject 0.1 mL intradermally once; trained staff read the reaction after 48–72 hours.
Common side effects
- Pain, itching, or redness at the injection site
- Small blister or ulcer, rarely
- Fever or swollen lymph nodes, rarely
Important warnings
- A negative test does not rule out tuberculosis, especially after recent exposure or with weakened immunity.
- Prior BCG vaccination may affect results; interpretation depends on risk factors.
- Do not inject under the skin or into a vein.
- Use trained staff to administer and interpret the test.
Pregnancy
Testing is generally considered safe during pregnancy when indicated.
Breastfeeding
No known concern with breastfeeding.
Interactions
- Live-virus vaccines may affect test results; testing may be done the same day or delayed at least four weeks.
- Immunosuppressive medicines or illness may reduce the skin reaction.
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.