Quick Answer: How Much Phenylephrine Is Too Much?

How many nasal decongestant pills do I take?

The recommended dose of SUDAFED® Sinus and Nasal Decongestant, for adults and children over 12 years, is 1 tablet 3 to 4 times a day.

SUDAFED® Sinus and Nasal Decongestant should not be used for children under 12 years.

Do not exceed 4 tablets in 24 hours..

What happens if you take decongestants for too long?

Decongestant nasal sprays and drops should not be used for more than a week at a time because using them for too long can make your stuffiness worse. Speak to a GP if your symptoms do not improve after this time.

Does phenylephrine increase heart rate?

Phenylephrine increases blood pressure and heart rate without affecting heart rhythm.

How many mg of phenylephrine is safe?

Take one dose (maximum 12.2mg) up to four times a day. Take with a glass of water. Leave at Ieast 4 hours between doses. Do not take more than 4 doses in 24 hours.

What happens if you take too much nasal decongestant?

The longer you use a spray decongestant, the more likely you are to get the rebound phenomenon. It can lead to chronic sinusitis and other serious, long-term problems. Give your doctor a call if you’re having any of these issues: It’s all in your nose.

How much phenylephrine 10 mg can I take?

Directions: adults and children 12 years and over: take 1 tablet every 4 hours; do not take more than 6 tablets in 24 hours; children under 12 years: ask a doctor.

What happens if you overdose on phenylephrine?

Overdose symptoms may include severe dizziness or drowsiness, slow heart rate, and fainting.

When should I take phenylephrine?

The FDA-approved indication for intravenous (IV) phenylephrine hydrochloride is for increasing blood pressure in adults with clinically significant hypotension resulting primarily from vasodilation in such settings as septic shock or anesthesia.

Can I take 2 sudafed at once?

Sudafed 12 Hour Take one tablet every 12 hours. Do not take more than two tablets every 24 hours.

Will phenylephrine keep you awake at night?

Phenylephrine relieves congestion of the nasal passages and is found in many cold and flu remedies. There is some controversy over whether it works at the dosages usually found in over-the-counter products. Sleeplessness is a common side effect.

Will phenylephrine test positive on a drug test?

Phenylephrine, an α(1) -adrenergic agonist, and methamphetamine, a prescription drug and substance of abuse, have similar chemical structures and thus have the potential to cross-react in qualitative screening tools such as a urine drug screening (UDS) performed by immunoassay.

Can I take 20 mg of phenylephrine?

In the USA and Australia, the adult dosage of phenylephrine HCl is 10 mg every 4 h, whereas in a few South American countries, the adult dosage in combination products may be 20 mg every 8 h. The total daily dose is 60 mg for both regions.

Who should not take phenylephrine?

do not take phenylephrine if you are taking a monoamine oxidase (MAO) inhibitor, such as isocarboxazid (Marplan), phenelzine (Nardil), selegiline (Eldepryl, Emsam, Zelapar), and tranylcypromine (Parnate), or if you have stopped taking one of these medications within the past 2 weeks.

Can I take phenylephrine daily?

For nasal decongestants: Topical nasal decongestants should not be used for more than three days. You get nervous, dizzy, or are unable to sleep while taking an oral medicine with phenylephrine. You take too much. Immediately contact a healthcare provider or the poison control national helpline at 800.222.

Can phenylephrine make you sleepy?

Mild upset stomach, trouble sleeping, dizziness, lightheadedness, headache, nervousness, shaking, or fast heartbeat may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly. This product may reduce blood flow to your hands or feet, causing them to feel cold.

When should phenylephrine be avoided?

high blood pressure. significant uncontrolled high blood pressure. a heart attack. coronary artery disease.

Can you overdose on decongestants?

Symptoms of overdose may include: severe dizziness/fainting, hallucinations, fast/irregular heartbeat, slow/shallow breathing, vomiting, seizures.

How long does phenylephrine stay in your system?

The elimination half life of phenylephrine is about 2.5 to 3.0 hours.