Increases risk of side effects of theophylline such as convulsions, tremors, insomnia, vomiting, heart palpitations. It causes too much rOPINIRole in the bloodstream leading to confusion, vomiting, weakness, fainting, agitation, and drowsiness. May increase the effects of rasagiline, which could lead to severe headache, visual disturbances, confusion, stupor or coma, seizures, chest pain, unexplained nausea or vomiting, and stroke-like symptoms.ĭecreases the effectiveness of regadenoson causing it to not work as intended. Increases blood levels of pimozide, which could affect heart rhythm. It causes methotrexate to fail in its ability to relieve rheumatoid arthritis. Prevents caffeine from working as intended, which requires larger doses of caffeine to get desired results.Ĭhanging caffeine consumption can lead to Lithium toxicity: nausea, vomiting, diarrhea, drowsiness, muscle weakness, tremor, lack of coordination, blurred vision, or ringing in your ears. Increases caffeine’s effects leading to caffeine overdose symptoms. Increases the effects of caffeine, which could result in overdose symptoms. Increases risk for DULoxetine side effects like nausea, dry mouth, insomnia, drowsiness, and constipation. Interferes with this drug’s intended purpose requiring larger doses than would be expected.

It can almost double the amount of caffeine in the blood due to interfering with caffeine’s half-life. Increases caffeine’s effects, which could cause headaches, high blood pressure, restlessness, insomnia, and nervousness. Swelling, increased heart rate, low blood pressure, irregular heartbeat.Ĭaffeine increases blood concentrations of asenapine beyond what is considered safe.Īffects bone marrow functioning resulting in anemia, bleeding, and infections. Caffeine prevents adenosine from working as intended.Ĭaffeine increases blood concentrations of this drug, leading to potentially life-threatening side effects.

Matcha tea vs green tea caffeine