What are the possible side effects of Actiq?

Actiq (fentanyl), an opiate lozenge for the treatment of breakthrough cancer pain, is a powerful narcotic that can cause many side effects. Like any narcotic, it slows the central nervous system and the heart rate, so get medical attention immediately if you experience any of these side effects: slow, shallow breathing; extreme drowsiness; dizziness; confusion; fainting; heartbeat that is slower or faster than normal; a seizure.

Other side effects that have been reported with Actiq include: drowsiness; nausea; stomach pain; vomiting; constipation; diarrhea; gas; heartburn; loss of appetite; weight loss; trouble urinating; weakness; headache; vision changes; anxiety; depression; hallucinations (seeing things or hearing voices that don't exist); strange thoughts or dreams; trouble falling or staying asleep; dry mouth; sweating; flushing; uncontrollable shaking of a part of the body; back or chest pain; pain, sores or irritation in the mouth where you placed the Actiq tablet; rash; itching; swelling of the hands, arms, feet, ankles or lower legs. Talk to your doctor if you have any side effects that bother you or don’t go away.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.