Do not use this medication if you are allergic to nortriptyline, or if you have recently had a heart attack. Do not use nortriptyline if you have used an MAO inhibitor such as isocarboxazid (Marplan), phenelzine (Nardil), rasagiline (Azilect), selegiline (Eldepryl, Emsam), or tranylcypromine (Parnate) within the past 14 days. Serious, life-threatening side effects can occur if you take nortriptyline before the MAO inhibitor has cleared from your body.

Before taking  Pamelor, tell your doctor if you are allergic to any drugs, or if you have:

heart disease;

a history of heart attack, stroke, or seizures;

bipolar disorder (manic-depression);

schizophrenia or other mental illness;

diabetes (nortriptyline may raise or lower blood sugar);

overactive thyroid;

glaucoma; or

problems with urination.

If you have any of these conditions, you may need a dose adjustment or special tests to safely take nortriptyline.

You may have thoughts about suicide when you first start taking an antidepressant, especially if you are younger than 24 years old. Tell your doctor if you have worsening symptoms of depression or suicidal thoughts during the first several weeks of treatment, or whenever your dose is changed.

Your family or other caregivers should also be alert to changes in your mood or symptoms. Your doctor will need to check you at regular visits for at least the first 12 weeks of treatment.
This medication may be harmful to an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant during treatment. It is not known whether nortriptyline passes into breast milk or if it could harm a nursing baby. Do not use this medication without telling your doctor if you are breast-feeding a baby.

Older adults may be more likely to have side effects from this medication.
Do not give this medication to anyone under 18 years old without the advice of a doctor.

Important safety information:

Avoid drinking alcohol. It can cause dangerous side effects when taken together with nortriptyline.

Avoid using other medicines that make you sleepy (such as cold medicine, pain medication, muscle relaxers, medicine for seizures, or other antidepressants). They can add to sleepiness caused by nortriptyline.

Grapefruit and grapefruit juice may interact with nortriptyline. Discuss the use of grapefruit products with your doctor before increasing or decreasing the amount of grapefruit products in your diet.
Nortriptyline can cause side effects that may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be awake and alert. Avoid exposure to sunlight or artificial UV rays (sunlamps or tanning beds). Nortriptyline can make your skin more sensitive to sunlight and sunburn may result. Use a sunscreen (minimum SPF 15) and wear protective clothing if you must be out in the sun.

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

Call your doctor at once if you have any new or worsening symptoms such as: mood or behavior changes, anxiety, panic attacks, trouble sleeping, or if you feel impulsive, irritable, agitated, hostile, aggressive, restless, hyperactive (mentally or physically), more depressed, or have thoughts about suicide or hurting yourself.
Call your doctor at once if you have any of these serious side effects:

fast, pounding, or uneven heart rate;

chest pain or heavy feeling, pain spreading to the arm or shoulder, nausea, sweating, general ill feeling;

sudden numbness or weakness, especially on one side of the body;

sudden headache, confusion, problems with vision, speech, or balance;

confusion, hallucinations, or seizure (convulsions);

easy bruising or bleeding, unusual weakness;

restless muscle movements in your eyes, tongue, jaw, or neck;

tremors;

extreme thirst with headache, nausea, vomiting, and weakness;

feeling light-headed or fainting; or

urinating less than usual or not at all.

Less serious side effects may include:

nausea, vomiting, stomach pain, loss of appetite;

constipation or diarrhea;

weight changes;

dry mouth, unpleasant taste;

weakness, lack of coordination;

numbness or tingly feeling;

blurred vision, headache, ringing in your ears;

mild skin rash;

breast swelling (in men or women); or

increased sweating.

This is not a complete list of side effects and others may occur. Tell your doctor about any unusual or bothersome side effect.