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  2. Anti-allergic agent - Wikipedia

    en.wikipedia.org/wiki/Anti-allergic_agent

    Other common side effects for all generations include gastrointestinal side effects, headaches and tiredness. [9] Antihistamines are generally safe to use during pregnancy with second-generation antihistamines being more preferred due to their lack of sedation. [10]

  3. Doxylamine - Wikipedia

    en.wikipedia.org/wiki/Doxylamine

    Doxylamine and other first-generation antihistamines are the most widely used sleep medications in the world. [6] Typical side effects of doxylamine (at recommended doses) include dizziness, drowsiness, grogginess, and dry mouth, among others. [7] [4] As an antihistamine, doxylamine is an inverse agonist of the histamine H 1 receptor.

  4. Antihistamine - Wikipedia

    en.wikipedia.org/wiki/Antihistamine

    Antihistamines are drugs which treat allergic rhinitis, common cold, influenza, and other allergies. [1] Typically, people take antihistamines as an inexpensive, generic (not patented) drug that can be bought without a prescription and provides relief from nasal congestion, sneezing, or hives caused by pollen, dust mites, or animal allergy with few side effects. [1]

  5. Chlorphenamine - Wikipedia

    en.wikipedia.org/wiki/Chlorphenamine

    It is a first-generation antihistamine and works by blocking the histamine H 1 receptor. [2] Common side effects include sleepiness, restlessness, and weakness. Other side effects may include dry mouth and wheeziness. [2] Chlorpheniramine was patented in 1948 and came into medical use in 1949. [3] It is available as a generic medication and ...

  6. Benadryl - Wikipedia

    en.wikipedia.org/wiki/Benadryl

    Benadryl containing diphenhydramine can interact with alcohol as both are central nervous system (CNS) depressants. Side effects such as drowsiness and dizziness may be enhanced when taking alcohol with diphenhydramine. [16] Mixing diphenhydramine with alcohol can also increase the chances of losing consciousness due to sedation. [17]

  7. Hydroxyzine - Wikipedia

    en.wikipedia.org/wiki/Hydroxyzine

    Hydroxyzine works by blocking the effects of histamine. [9] It is a first-generation antihistamine in the piperazine family of chemicals. [8] [4] Common side effects include sleepiness, headache, and dry mouth. [8] [9] Serious side effects may include QT prolongation. [9] It is unclear if use during pregnancy or breastfeeding is safe. [8]