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Reference Range:

Pre dose <0.1 mg/L Post dose 0.45-0.9 mg/L

Turnaround Time:

<5 days


This test is being referred to Bristol Southmead Hospital


Rifabutin Levels. Requesters have found these assays to be of value in patients receiving agents that have known drug interactions with Rifabutin (such as clarithromycin, a number of antifungal agents and many of the antiviral agents used to treat HIV infection) and in cases of suspected toxicity.

Sample Requirements:

4 mls clotted blood. We recommend a pre dose sample and three post dose samples, taken 1 hour, 2 hours and 4 hours after oral administration.

Important Information:

Test Information Required: • Patient name, sex and age • Laboratory number • Dosage, frequency and timing of samples • Clinical Summary • Other medications (essential) • Address for report • Phone (fax if preferred) number for report or email address for an electronic copy • Contact name • Appropriate hazard warnings