Chinese Herbs work differently than prescription medicines. Drugs generally work to suppress a symptom, not cure a disease. An example is diabetes, cholesterol or hypertension medications that control blood sugar, lipids (fats: cholesterol) or pressure only while you take them. If you stop the drug, the symptom persists.
In contrast to pharmaceuticals, Chinese medicine works to cure the disease. The herbs are slower acting: often they do not provide the immediate effect people have come to expect from drugs, such as pain killers or mind altering drugs: anti-depressants, anxiety and insomnia medications. This is because Chinese medicine is working at a deep level to change the bodily processes perpetuating the disease. Turning the ship is a longer term process than whitewashing over a symptom. Therefore it commonly takes a few days, or 1 -2 weeks to begin seeing results with Chinese herbal therapy. Unlike drugs though, Chinese medicine is often able to cure the disease so that in time the drugs and herbs can be withdrawn and the disease & associated symptoms do not reappear.
Another benefit of Chinese medicine is that it does not cause the undesirable side effects seen from prescription drugs.