howMed Know Yourself
Symphathomimetics mimic the effects of sympathetic system. Two types of receptors are present: Alpha receptors Beta receptors All sympathomimetics act … Read More »
Autonomic Nervous System –An Introduction
The central nervous system is divided into: Somatic system –voluntary Autonomic system –involuntary Autonomic nervous system is further classified into … Read More »
Drug Dependence
Definition The WHO defines drug dependence as: “A state, psychic and sometimes physical resulting from taking a drug characterized by … Read More »
Adverse Drug Effects
Undesirable or harmful effects which can occur at therapeutic doses and need a reduction of dose or drug withdrawal. Adverse … Read More »
Factors Modifying Action of Drugs
A multitude of host & environmental factors influence drug response. Understanding of these factors can guide choice of appropriate drug … Read More »
Mechanism of Drug Action -Miscellaneous Mechanisms
Certain drugs do not act through any of the mechanisms already mentioned, they are categorized as miscellaneous. These include: Colchicines, … Read More »
Mechanism of Drug Action -Drug Channel Interactions
In drug channel interaction, drug interfere with the flow of ions through the channels specific for these ions. These include … Read More »
Mechanism of Drug Action -Drug Enzyme Interactions
Drug enzyme interaction is similar to drug receptor interactions. The drugs resemble the natural substrates, bind enzymes and cause change … Read More »
Mechanism of Drug Action -Drug Receptor Interactions
Receptor: Macromolecules protein in nature which are target sites for drugs. Most drugs have to bind receptors to produce effects. … Read More »
Mechanism of Drug Action -Chemical Mechanisms
In chemical mechanisms, drugs act by producing chemical reactions in the body. These include: Chemically acting antacids– NaHCO3 Chelating agents– … Read More »