Tried or prescribed Antihistamines? Share your experience.
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Possible side effects of antihistamines include:
- Sedation
- Drying of secretions, which impairs their clearance and may lead to complications (such as sinusitis, otitis, and pneumonia)
- Retention or difficulty passing urine
- Rashes
- Dizziness
- Headache
- Indigestion
- Constipation
- Anemia
Talk to your doctor before taking these medications if you have the following conditions, which can be made worse by the side effects of antihistamines:
- Urinary problems due to an enlarged prostate gland
- Glaucoma
- Breathing problems
Possible side effects of over-the-counter antihistamines include:
- Drowsiness (Claritin and Zyrtec are non-sedating)
- Slowed reaction time
- Dry mouth
Possible side effects of prescription antihistamines include:
- Drowsiness
- Lightheadness
- Blurry vision
- Change in ability to think clearly
- Dry mouth, nose, or throat
- Gastrointestinal upset, stomach pain, or nausea
- Increased appetite and weight gain
- Thickening of mucus
- Increased effects in people with kidney disease due to slower removal from the body
