Histantil Description

Histantil contains Promethazine HCl and is known as a sedating antihistamine. Histamine is a substance naturally produced in your body that is a part of your defense system when there is a threat present. This threat could be pet dander, smoke, pollen, or another allergen that has set off alarm bells that cause histamine to be sent to the targeted area to cause watery eyes, runny nose, itching, and sneezing as a way to expel the threat.

How Histantil Works to Relieve Watery Eyes, Runny Nose, and More

There are four known histamine receptors throughout your body, and histamine will attach to the area that is affected. If you are having trouble sleeping, it is the H1 receptor that has been activated and your neurochemistry is activated so you are wide awake and cannot sleep. Histantil can help you become drowsy by blocking the H1 receptor so histamine is unable to attach and therefore cannot produce the alert state that keeps you from sleep. It is not advised to take Histantil for any longer than seven days unless otherwise directed by your doctor.

Motion Sickness and Why it Happens

Histantil may also be prescribed to treat motion sickness and pre/post-operative nausea and vomiting. Motion sickness can occur from riding in a car, boat, or airplane; so you can take a Histantil before you venture out and enjoy the scenery without feeling nauseous as the H1 histamine receptor is unable to send messages to your vomit center that something is going on and you may be in danger.

When you are travelling by car, your body feels very little movement and yet your eyes are telling you that you are seeing trees, other cars, or buildings passing by. The motion-sensing organs of your inner ear is telling your brain you are sitting idle while your eyes are sending signals saying there are objects moving past you so you must be moving. It’s believed that these mixed signals sound the alarm that you must be hallucinating and that what you are seeing is caused by drugs which may be toxic. The response is to cause you to vomit to clear the poison from your body.

Before You Take Histantil

Ask your doctor if taking Histantil is safe while you are pregnant, may become pregnant, or are breast feeding. Discuss other medical conditions or allergies you have with your doctor and list any OTC and Rx drugs you are on, including dietary, vitamin, or herbal supplements so it can be determined if Histantil is the right medication for your situation.

Histantil Precautions

Because Histantil can cause drowsiness, you should not drive, operate machinery, or perform any tasks that are considered risky. You should not give Histantil to a child under the age of 2 years as it can cause breathing problems. Histantil may alter the results of certain lab tests so make it known to medical staff that you are taking it. If your symptoms do not improve while taking Histantil, see your doctor as soon as you can.

Possible Side Effects of Histantil

• Double vision
• Dry mouth
• Headaches
• Feeling tired or drowsy

Drugs Similar to Histantil

• Phenergan
• Xyzal
• Benadryl