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Expectorants operate mainly by increasing the hydration of mucus, making it thinner and less viscous. This action helps in loosening and clearing mucus from the respiratory tract, which can be particularly beneficial during a cough. As the mucus becomes easier to expel, patients often find relief from chest tightness and difficulty in breathing. One popular expectorant is guaifenesin, which is found in many over-the-counter cough syrups and cold medications.


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classification of different dosage forms

Understanding the life cycle and behavior of lice is essential for effective treatment. Adult lice are wingless insects that live on the skin and feed on the blood or tissue fluids of the host. They reproduce quickly, with females laying several eggs (nits) each day, which attach to the hair shafts. The life cycle from egg to adult can be completed in as little as three weeks under optimal conditions, allowing infestations to escalate rapidly.


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classification of different dosage forms