i-Base

Resistance, taking drugs on time and missed doses

30 March 2015. Related: Pictures and diagrams.

Two diagrams showing how taking your combination on time keeps drug levels at a safe level and missed doses lead to low drug levels and increase the risk of resistance.

1.  Drug levels with good adherence:

Good drug levels

2.  Missing or being late with a drug lets the drug levels fall to a level where resistance can develop:

Missed dose = low drug levels