MySheen

Factors affecting the efficacy of fishery drugs

Published: 2024-11-08 Author: mysheen
Last Updated: 2024/11/08, The main results are as follows: 1. the dosage and the effect of the dosage form of the drug vary with the dose, and even change qualitatively, for example, when the gold convergent drug zinc sulfate is used locally, the low concentration has the effect of convergence and the medium concentration has the stimulating effect. However, it has corrosive effect at high concentration. If the dosage form of the drug is different, even in the case of the same drug dose, the intensity, effect and time of action are also different. 2. the mode of administration, the way of administration, the time of administration, the times of administration and repeated use of drugs.

1. The dosage and dosage form of the drug

The effect of the drug varies with the dose, and even changes qualitatively. For example, when the metal convergence drug zinc sulfate is used locally, the low concentration has the effect of convergence, the medium concentration has the stimulating effect, and the high concentration has the corrosive effect. If the dosage form of the drug is different, even in the case of the same drug dose, the intensity, effect and time of action are also different.

2. Mode of administration

The route of administration, the time of administration, the times of administration and repeated use of drugs can affect the effect of the drug. There is a significant difference in the effect of drugs between external administration routes such as drug bath (or sprinkling) and oral administration (or injection); different administration time (day or night), even if the dose of the drug is the same, the effect will be different.

3. Animal status

The situation and physiological state of aquatic animals are different, which will produce different effects. (1) species differences: there are differences in drug sensitivity among different species, aquatic animals or individuals of the same species; (2) physiological differences: general young and old aquatic animals are more sensitive to drugs; (3) individual differences: different individuals have different drug tolerance, which may be related to individual genetic factors. (4) the function and pathological condition of the body: generally thin, malnourished and aquatic animals under pathological condition are more sensitive to drugs.

4. Environmental factors

For aquatic animals, the environment has a great influence on the effect of drugs. The main influencing factors are: (1) water temperature: the efficacy is generally positively correlated with water temperature, but some drugs are on the contrary, (2) organic matter: it will affect the efficacy of most drugs, such as potassium permanganate, chlorine-containing disinfectants, etc. (3) pH: the effect of acidic drugs, anionic surfactants and tetracyclines and other antimicrobial agents in alkaline water is weakened, while the efficacy of alkaline drugs, sulfonamides and cationic surfactants increases with the increase of pH value. (4) dissolved oxygen: the tolerance of aquatic animals to drugs increases when dissolved oxygen is high, and poisoning occurs easily when dissolved oxygen is low. (5) Light and season: aquatic animals have stronger tolerance to drugs at night than during the day, and are more sensitive to drugs in summer than in winter; (6) the state and resistance of pathogens: some parasites that can form cysts can often form cysts under the stimulation of drugs, and their resistance to drugs is significantly strengthened. in addition, stress factors such as fishing, transportation and water exchange can also increase the sensitivity of aquatic animals to drugs.

 
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