The side effects of TK inhibitors are usually mild and treatable. They are often more noticeable in the first four weeks of treatment and begin to settle after this.
Side effects generally disappear when treatment is stopped. If you have severe side effects, your doctor may ask you to stop taking the drug for a few days. After a short break, you may be able to start taking it again without having the same problems. Occasionally people need to stop treatment because their side effects are too severe.
Always let your doctor know if you notice any new side effects or your side effects get worse.