Get emergency medical help if you have any signs of an allergic reaction to Inderal: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have:
slow or uneven heartbeats;
a light-headed feeling, like you might pass out;
wheezing or trouble breathing;
shortness of breath (even with mild exertion), swelling, rapid weight gain;
sudden weakness, vision problems, or loss of coordination;
cold feeling in your hands and feet;
depression, confusion, hallucinations;
liver problems - nausea, upper stomach pain, itching, tired feeling, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes);
low blood sugar - headache, hunger, weakness, sweating, confusion, irritability, dizziness, fast heart rate, or feeling jittery;
low blood sugar in a baby - pale skin, blue or purple skin, sweating, fussiness, crying, not wanting to eat, feeling cold, drowsiness, weak or shallow breathing (breathing may stop for short periods), seizure (convulsions), or loss of consciousness; or
severe skin reaction - fever, sore throat, swelling in your face or tongue, burning in your eyes, skin pain, followed by a red or purple skin rash that spreads (especially in the face or upper body) and causes blistering and peeling.
Common Inderal side effects may include:
nausea, vomiting, diarrhea, constipation, stomach cramps;
decreased sex drive, impotence, or difficulty having an orgasm;
sleep problems (insomnia); or
tired feeling.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
 Inderal side effects (more detail)
