To know the authenticity, you can check the hospital homemade drug packaging is a medical institution preparation approval number, the format is:
X drug preparation word H (Z) + 4 digits of the year + 4 digits of the number of running.
X-province, autonomous region, municipality directly under the central government abbreviation, H-chemical preparation, Z-Chinese medicine preparation.
Or you can directly phone the provincial drug regulatory department registry.
As for the effect, can only be used to know. Because of the higher interest, so there are hospitals that make their own drugs, will tend to prescribe these drugs.