Medication alone will not change your anxiety long-term as it doesn't change root causes, so it is best used in conjunction with talk therapy.
Unexpected attacks of anxiety that don't happen very often ('acute, episodic anxiety' e.g. infrequent panic attacks) can be treated with benzodiazepines. These are very effective, but have many potential downsides that need to be reviewed and carefully considered with a knowledgeable, experienced doctor.
Anxiety that bothers you on a daily or nearly-daily basis for a long time ('chronic, persistent anxiety'; e.g., excessive worrying or most diagnosable anxiety-related illnesses) is best addressed with anxiolytic antidepressants, most commonly the selective serotonin-reuptake inhibitors (SSRIs) or serotonin/norepinephrine reuptake inhibitors (SNRIs).
A third type is characterised as foreseeable anxiety that is triggered by specific, identifiable, predictable circumstances. This kind of situational anxiety is commonly known as "performance" anxiety and can be treated with low, preemptive doses of norepinephrine-blocking medications called beta-blockers. Interestingly, beta-blockers are primarily used to treat high blood pressure, but were also found to help reduce the physiological manifestations of situational anxiety.