Readers ask: How often can you take phenylephrine?

Phenylephrine comes as a tablet, a liquid, or a dissolving strip to take by mouth. It is usually taken every 4 hours as needed. Follow the directions on your prescription label or the package label carefully, and ask your doctor or pharmacist to explain any part you do not understand.

How much phenylephrine HCl can you take in a day?

  • Age Dose and how often to take – for Phenylephrine only Adults, the elderly and children aged 12 years and over. Take one dose (maximum 12.2mg) up to four times a day. Take with a glass of water.

Can you 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.

How long does phenylephrine stay in your system?

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

Can you overdose on phenylephrine hydrochloride?

What happens if I overdose on Phenylephrine Nasal (4-Way)? Overdose symptoms may include severe dizziness or drowsiness, slow heart rate, and fainting.

How many phenylephrine HCl 10 mg should 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 take too much phenylephrine?

They can help make sure you or your child doesn’t take more than one medication that contains phenylephrine. If you take too much, symptoms of an overdose of Sudafed PE can include: headache. dizziness.

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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.

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.

Will phenylephrine keep me awake?

Sudafed Pe (Phenylephrine) Clears your sinuses. Sudafed (Pseudoephedrine) relieves stuffy nose, but it could keep you up at night. Don’t forget your photo ID or you won’t be able to buy it in the drugstore.

Will phenylephrine cause a false positive?

The cough suppressant dextromethorphan may cause falsepositive PCP1,2,4 and opioid levels due to its metabolite’s similarity to the opioid agonist levorphanol. Furthermore, decongestants phenylephrine and pseudoephedrine have shown falsepositive amphetamine levels due to similar structures.

What does phenylephrine do to the body?

Phenylephrine is used for the temporary relief of stuffy nose, sinus, and ear symptoms caused by the common cold, flu, allergies, or other breathing illnesses (e.g., sinusitis, bronchitis). This medication works by decreasing swelling in the nose and ears, thereby lessening discomfort and making it easier to breathe.

Can you overdose on decongestants?

Symptoms of overdose may include: severe dizziness/fainting, hallucinations, fast/irregular heartbeat, slow/shallow breathing, vomiting, seizures. If this product has been prescribed, do not share this medication with others.

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Is it OK to take phenylephrine with high blood pressure?

To keep your blood pressure in check, avoid over-the-counter decongestants and multisymptom cold remedies that contain decongestants — such as pseudoephedrine, ephedrine, phenylephrine, naphazoline and oxymetazoline. Instead: Choose a cold medication designed for people who have high blood pressure.

How effective is phenylephrine?

The study of 539 adults lasted one week and failed to find a dose of phenylephrine within the 10 mg to 40 mg range that was more effective than a placebo in relieving nasal congestion. The approved Food and Drug Administration (FDA) dose is 10 mg every four hours for “temporary relief of nasal congestion.”

Is phenylephrine safe for kidneys?

Oral decongestants such as pseudoephedrine (SUDAFED) or phenylephrine which are found in many cough and cold products. Oral decongestants can increase blood pressure and cause your heart and kidneys to work too hard.

Is phenylephrine the same as Benadryl?

Diphenhydramine is an antihistamine. Phenylephrine is a decongestant. Diphenhydramine and phenylephrine is a combination medicine used to treat runny or stuffy nose, sneezing, itching, watery eyes, and sinus congestion caused by allergies, the common cold, or the flu.

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