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Before taking perindopril, tell your doctor if you are taking any of the following drugs:

• lithium (Lithobid, Eskalith);

• a potassium supplement such as K-Dur, Klor-Con;

• salt substitutes that contain potassium; or

• a diuretic (water pill).

If you are using any of these drugs, you may not be able to use perindopril or you may need dosage adjustments or special tests during treatment.

There may be other drugs not listed that can affect perindopril. Tell your doctor about all the prescription and over-the-counter medications you use. This includes vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start using a new medication without telling your doctor.

Get emergency medical help if you have any of these signs of an allergic reaction: hives; severe stomach pain; difficulty breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have any of these serious side effects:

• feeling light-headed, fainting;

• urinating more or less than usual, or not at all;

• fever, chills, body aches, flu symptoms;

• pale skin, easy bruising or bleeding;

• tired feeling, muscle weakness, and pounding or uneven heartbeats;

• swelling, rapid weight gain;

• chest pain; or

• jaundice (yellowing of the skin or eyes).

Less serious side effects may be more likely to occur, such as:

• cough, stuffy nose;

• muscle or joint pain;

• dizziness, drowsiness, headache;

• sleep problems (insomnia);

• diarrhea, upset stomach; or

• mild skin itching or rash.

Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.