What is Phenylephrine HCl (Pressors)? Uses, warnings & side effects

Updated May 14, 2025  •  Published Sep 22, 2023

Phenylephrine HCl (Pressors) overview

BRAND NAMES:

  • Biorphen, Vazculep

Generic Names:

  • Phenylephrine Hcl (Pressors)

Uses:

  • Treats low blood pressure during surgery, shock, or an allergic reaction.

Therapeutic Classes:

  • Anesthetic Adjunct, Vasopressor

Forms:

  • Injectable

How it’s taken:

  • By injection

What is Phenylephrine HCl (Pressors) used for?

What form(s) does Phenylephrine HCl (Pressors) come in?

  • Injectable

What are common Phenylephrine HCl (Pressors) dosages?

  • Vial 1ml of 10mg/ml

  • Vial 5ml of 10mg/ml

  • Vial 10ml of 10mg/ml

Phenylephrine HCl (Pressors) images - What does Phenylephrine HCl (Pressors) look like?

  • Phenylephrine HCl (Pressors)
    10ml of 10mg/ml vial

  • Phenylephrine HCl (Pressors)
    1ml of 10mg/ml vial

  • Phenylephrine HCl (Pressors)
    5ml of 10mg/ml vial

How to take Phenylephrine HCl (Pressors)

  • Injection routeA nurse or other health provider will give you this medicine. It is given as a shot under your skin, into a muscle, or into a vein.

What to do if you miss a dose of Phenylephrine HCl (Pressors)

Phenylephrine HCl (Pressors) contraindications - Who shouldn't take Phenylephrine HCl (Pressors)?

  • This medicine is not right for everyone. You should not receive it if you had an allergic reaction to phenylephrine.

Phenylephrine HCl (Pressors) warnings

  • Tell your doctor if you are pregnant or breastfeeding, or if you have kidney disease, liver disease, asthma, heart or blood vessel problems (such as heart failure, peripheral vascular disease, slow heartbeat), an overactive thyroid, or a history of angina. Tell your doctor if you have an allergy to sulfite medicines.

  • Your doctor will do lab tests at regular visits to check on the effects of this medicine. Keep all appointments.

  • Fast, slow, or uneven heartbeat

  • Redness, pain, or discoloration at the injection site

  • Tingling in your hands or feet

Phenylephrine HCl (Pressors) interactions & what to avoid when taking Phenylephrine HCl (Pressors)

  • Some medicines can affect how phenylephrine works. Tell your doctor if you are using amiodarone, aldosterone, atomoxetine, atropine, chlorpromazine, clonidine, guanfacine, hydrocortisone, methylergonovine, nifedipine, reserpine, an MAO inhibitor (MAOI), or a tricyclic antidepressant.

  • Your doctor will do lab tests at regular visits to check on the effects of this medicine. Keep all appointments.

Phenylephrine HCl (Pressors) side effects - How does Phenylephrine HCl (Pressors) make you feel?

Serious Side Effects

  • Tingling in your hands or feet

  • Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing

  • Chest pain, trouble breathing

  • Fast, slow, or uneven heartbeat

  • Redness, pain, or discoloration at the injection site

Less Serious Side Effects

  • Anxiety or restlessness

  • Headache

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