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2. Diphenhydramine - Wikipedia

   en.wikipedia.org/wiki/Diphenhydramine

   The most prominent side effects are dizziness and sleepiness. [44] Diphenhydramine is a potent anticholinergic agent and potential deliriant in higher doses. This activity is responsible for the side effects of dry mouth and throat, increased heart rate, pupil dilation, urinary retention, constipation, and, at high doses, hallucinations or ...

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. 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]

6. 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]

7. Cinnarizine - Wikipedia

   en.wikipedia.org/wiki/Cinnarizine

   Side effects experienced while taking cinnarizine range from the mild to the quite severe. Possible side effects include drug-induced parkinsonism, [22] drowsiness, sweating, dry mouth, headache, skin problems, lethargy, gastrointestinal irritation, hypersensitivity reactions, as well as movement problems, muscle rigidity, and tremor. [15]

8. H1 antagonist - Wikipedia

   en.wikipedia.org/wiki/H1_antagonist

   Infrequent adverse effects include urinary retention, palpitations, hypotension, headache, hallucination, psychosis and erectile dysfunction. [4] [6] [7] The newer, second-generation H 1-antihistamines are far more selective for peripheral histamine H 1-receptors and have a better tolerability profile compared to the first-generation agents ...

9. 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 ...