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What are the side effects of theophylline?

Donna Hill Howes, RN
Family Practitioner

Side effects may include headache, restlessness, insomnia, dizziness, nausea, vomiting, abdominal cramps, and loss of appetite. Other side effects may include twitching of the hands and fingers, seizures, heart palpitations, the need to urinate more often than usual, dehydration, and an increase in liver enzymes in the blood. 

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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.