The Side Effects of Benadryl Allergy Relief
The most common side effect of Benadryl is drowsiness and weakness. If for any reason you experience extreme drowsiness, faintness or lightheadedness, clumsiness or unsteadiness, call your doctor immediately. Older adults are especially sensitive to the sedating effects of the anticholinergic effects of antihistamines such as Benadryl. Because of this drying effect, patients may suffer with constipation, dry mouth, decreased sweating, and trouble urinating, especially men with enlarged prostrates.
Benadryl has a tendency to cause stomach issues including heartburn and indigestion. Some patients will have nausea, with or without vomiting, and appetite loss. Constipation is common, but some people will have diarrhea instead.
Patients with asthma are cautioned when using antihistamines such as Benadryl. Asthma is synonymous with a tight chest and wheezing and the use of antihistamines can dry up mucus secretions to the extent that the chest becomes tighter and makes asthma worse. Before using this product check with your doctor before using Benadryl.
As most people complain of drowsiness when using Benadryl, others get too excited and feel side effects such as restlessness, nervousness, shakiness, or irritability. Medications can affect people in opposite ways.