What is Pentam: Uses, Warnings & Interactions

Updated May 14, 2025  •  Published Dec 30, 2020

Pentam overview

BRAND NAMES:

  • Pentam

Generic Names:

  • Pentam

Uses:

  • Treats Pneumocystis carinii pneumonia (PCP) and other types of infections.

Therapeutic Classes:

  • Antiprotozoal

Forms:

  • Injectable

How it’s taken:

  • By injection

What is Pentam used for?

What form(s) does Pentam come in

  • Injectable

What are common Pentam doses?

  • Solution Reconstituted 300MG

Common Pentam prescriptions

  • Pentam
    300mg solution reconstituted

How to take Pentam

  • Your doctor will prescribe your exact dose and tell you how often it should be given.

  • An IM shot is given in your muscle (upper arm, thigh, buttocks).

  • An IV is medicine that is put directly into your body through one of your veins.

  • This medicine should be given by a person trained to give IV or IM medicine, such as a nurse.

  • It is best to lie down while this medicine is given. To avoid dizziness, get up slowly.

  • This medicine should be given by a person trained to give IV or IM medicine, such as a nurse.

  • Your doctor will prescribe your exact dose and tell you how often it should be given.

  • An IV is medicine that is put directly into your body through one of your veins.

  • An IM shot is given in your muscle (upper arm, thigh, buttocks).

  • It is best to lie down while this medicine is given. To avoid dizziness, get up slowly.

What to do if you miss a dose of Pentam

  • This medicine needs to be given on a regular schedule. If you miss a dose, call your doctor for instructions.

  • Any pentamidine that has been prepared for the IV is good for 24 hours and should be kept at room temperature, away from heat and light.

  • Keep all medicine out of the reach of children.

Pentam contraindications

  • You should not use this medicine if you have ever had an allergic reaction to pentamidine.

Pentam warnings

  • If you are pregnant or breastfeeding, talk to your doctor before taking this medicine.

  • Before using this medicine, make sure your doctor knows if you have low blood pressure, diabetes, low blood sugar, or liver or kidney disease.

  • You may need to use a home glucose (sugar) test to check your blood sugar levels while you are taking this medicine. Make sure you understand how to do this.

  • Your doctor may want to check your blood on a regular schedule while you are using pentamidine. Keep all appointments.

  • Sore mouth or throat

  • Skin rash, itching, or hives

  • Trouble breathing

Pentam interactions

  • If you are pregnant or breastfeeding, talk to your doctor before taking this medicine.

  • Before using this medicine, make sure your doctor knows if you have low blood pressure, diabetes, low blood sugar, or liver or kidney disease.

  • You may need to use a home glucose (sugar) test to check your blood sugar levels while you are taking this medicine. Make sure you understand how to do this.

  • Your doctor may want to check your blood on a regular schedule while you are using pentamidine. Keep all appointments.

Pentam side effects

Serious Side Effects

  • Trouble breathing

  • Unusual bleeding or bruising

  • Slow, fast, or irregular heartbeat

  • Feeling very hungry or thirsty

  • Nervousness, sweating, confusion

  • Skin rash, itching, or hives

  • Sore mouth or throat

Less Serious Side Effects

  • Nausea, vomiting, loss of appetite

  • Pain, swelling, itching, or burning where the IV is given

  • Change in taste or a metallic taste in your mouth

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