Prescription antihistamine available online

When taken as prescribed, antihistamines are generally well tolerated. However, they can still cause some side effects.

The more common side effects of antihistamines include:

• Confusion

• Blurry vision

• Dry mouth

• Drowsiness

• Vomiting

• Nausea

• Dizziness

• Moody behavior

• Trouble urinating
  
  In rare cases, antihistamines may cause serious side effects. These can include:

• Delirium

• Tinnitus

• Euphoria

• Reduced coordination

• Constipation

• Diarrhea

According to peer-reviewed studies, H-1 antihistamines typically cause more noticeable side effects. These side effects are more common with first-generation antihistamines. Second-generation antihistamines have limited side effects.

A dry mouth is one of the most well-recorded side effects. Some patients also experience tinnitus and dizziness. With increased dosages, poor coordination and euphoria can happen. Delirium is a probable side effect at much higher doses.

H-2 receptors tend to be well-tolerated. But, they can still cause side effects. Gastrointestinal changes, confusion, dizziness, and fatigue can occur. One particular drug in this category that could trigger various side effects is cimetidine. It can lead to enlarged breast tissue in men (gynecomastia) and milky nipple discharge (galactorrhea) in women.

Antihistamines are generally safe, but there are some risks if you have other medical conditions or take certain medications.

Before you take a prescribed antihistamine, be sure to tell your doctor if you have any of the following health conditions or issues:

• High blood pressure

• Heart disease

• Thyroid disease

• Glaucoma

• Liver disease

• Kidney disease

• Difficulty urinating due to prostate enlargement

• Breathing difficulties (i.e., chronic bronchitis, emphysema, or asthma)

H-1 anthistimatmines are powerful muscarinic receptor antagonists. They can cause severe anticholinergic side effects such as dry skin, constipation, urinary retention, etc. Urinary retention can be especially problematic for men with BPH. In women, it could amplify the risk of urinary tract infections. Second-generation products are often seen as a safer variant for older adults who need to treat their allergies and allergic rhinitis.

To minimize the risk of side effects or other health problems, take only the recommended amount, specified on the label. If you take more, it won’t work faster or better. Instead, it can be dangerous for your health. If you have an Allegra allergy or Zyrtec allergy, talk to a doctor to get other medicines that can accommodate your needs.

When you begin a new medication, make sure to tell your doctor about any other medications, supplements, or herbs you’re taking. Some medications that might interact with an antihistamine include:

• Other antihistamines (i.e., ointment, diphenhydramine cream, and spray)

• Blood pressure medication (such as beta blockers and calcium channel blockers)

• MAO inhibitors

• Sleeping pills

• Seizure meds

• Narcotic pain medicine

• Muscle relaxants

Talk to a pharmacist or healthcare expert if you use other products that can lead to drowsiness, like cough relievers, pain meds, and drugs for anxiety and sleep. Using cannabis and alcohol can also make you drowsy, so avoiding products that can lead to a drop in blood pressure and drowsiness is essential.

If you plan on using products like these, consult an expert about using them safely. Antihistamines could interfere with some lab/medical tests, such as urine drug testing and brain scans for Parkinson’s disease. Therefore, it would be best to notify the lab personnel if you are using antihistamines.