Diphenhydramine Hcl – Uses, Side Effects, and More

Diphenhydramine HCl is an over-the-counter antihistamine used to relieve allergy symptoms. It’s also used to reduce the frequency and severity of some types of paroxysmal sneezing. It’s sometimes combined with other medications in nighttime cold or flu formulas. Diphenhydramine HCl products are available in several forms, including tablets, capsules, liquid drops, and extended-release capsules. Before reading the article you can check out this AlbenPure, an online-based pharma company that recently launched “Albendazole Capsules”. You can also check out cost of albendazole capsules from their site. However, let’s begin by diving into our main blog topic.


Diphenhydramine is an effective over-the-counter medication that can help treat allergies, insomnia, motion sickness, nausea, and vomiting. It works by blocking histamine receptors in the central nervous system and preventing or reducing allergic reactions. Diphenhydramine also has a sedative effect on the brain that helps people fall asleep faster. However, this medication should not be used for long periods of time because it can become addictive or toxic if taken regularly in high doses.

Diphenhydramine is an antihistamine that helps relieve allergy symptoms by blocking the effects of histamine. It’s available as a prescription and over-the-counter medication in several forms, including tablets, capsules, liquid drops, and nasal spray.

Side Effects

Side effects

Diphenhydramine is a sedating antihistamine drug, which means that it has the potential to cause drowsiness. Other common side effects include dry mouth and blurry vision; in rare cases, they may occur together with difficulty urinating or inability to urinate (urinary retention).

Some patients have reported experiencing nausea and vomiting as well as a sense of mental confusion after taking diphenhydramine. If you experience any of these symptoms, contact your doctor as soon as possible.

In some cases, diphenhydramine may also cause allergic reactions such as hives or a rash. Contact your doctor immediately if you experience any of these symptoms after taking the drug.


Drug Interactions

The following drug interactions and/or related problems have been selected on the basis of their potential significance and are not necessarily all-inclusive.

  • Alcohol

This medicine may increase the effects of alcohol. Avoid alcoholic beverages while taking Diphenhydramine HCl.

Diphenhydramine Hcl may also cause a severe condition called serotonin syndrome, which is a group of symptoms caused by too much serotonin in your body. The risk of serotonin syndrome happening is higher if you take Diphenhydramine Hcl with certain other medicines, including other medicines for allergies, depression or mental problems. Tell your doctor about all the prescription and over-the-counter medications you use, including vitamins and herbs.


The most common symptoms of a diphenhydramine overdose are:

  • Nausea or vomiting
  • Drowsiness, drowsiness that persists even after sleep occurs
  • Blurred vision, double vision, difficulty focusing your eyes, and difficulty seeing in the dark. if this happens to you, be sure to get help from someone else as quickly as possible so that they can take you to the emergency room. The longer you wait to seek treatment for a diphenhydramine overdose, the higher chance there is that permanent damage can occur to your liver or kidneys.

Although diphenhydramine can cause drowsiness and dry mouth, it is not addictive. The drug does not produce a “high” in users, so there is no risk of abuse or addictionDiphenhydramine Hcl may cause drowsiness, dizziness, and impaired judgment. Avoid driving or operating machinery while taking this medicine until you know how it affects your seizures and convulsions Low blood pressure, which can cause you to feel dizzy or lightheaded Slurred speech Confusion, disorientation, and difficulty concentrating Headache Numbness or tingling in your fingers and toes. If you experience these symptoms after taking diphenhydramine, seek medical attention immediately…


Diphenhydramine HCL is a drug that is used to treat many types of different illnesses and conditions. This medication comes in various forms such as tablets or capsules, which can be taken orally with food or water. Some people may experience side effects from taking this medication; however, these are usually mild in nature and go away on their own within a few days after treatment.