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Found 151 studies with search of: Caffeine OR Methylxanthine
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Rank Status Study
1 Completed Effects of Theobromine and Caffeine on Mood, Cognition and Blood Pressure
Condition: Mood
Interventions: Dietary Supplement: theobromine;   Dietary Supplement: Caffeine;   Dietary Supplement: caffeine + theobromine;   Dietary Supplement: placebo
2 Recruiting Caffeine for Apnea of Prematurity-Sleep (CAP-S) Study
Condition: Apnea of Prematurity
Interventions: Drug: Caffeine citrate injection;   Drug: placebo
3 Enrolling by invitation Interaction of Caffeine and Hydration on Voice
Condition: Voice Disorders
Interventions: Drug: C2 (200mg of caffeine; 1/2 L of water);   Drug: C3(200mg of caffeine; 1 L of water);   Drug: C1 (200mg of caffeine, no water);   Drug: Placebo (no caffeine, no water).
4 Recruiting Cognitive and Cerebral Blood Flow Effects of 2-week Caffeine Abstinence or Maintenance
Conditions: Cognitive Function;   Mood;   Cerebral Haemodynamics;   Caffeine Withdrawal
Interventions: Dietary Supplement: Placebo;   Dietary Supplement: Caffeine and Placebo;   Dietary Supplement: Placebo and Caffeine;   Dietary Supplement: Caffeine
5 Recruiting Combined Effects of Alcohol and Caffeine
Condition: Alcohol or Other Drugs Effects
Interventions: Drug: Alcohol + Caffeine Beverage;   Drug: Alcohol + Caffeine-placebo
6 Active, not recruiting Caffeine for Apnea of Prematurity (CAP)
Condition: Apnea of Prematurity
Intervention: Drug: Caffeine citrate injection
7 Completed
Has Results 		Efficacy of Caffeine Injection as an Adjuvant to Opioid Therapy in Cancer Pain
Conditions: Cancer;   Pain
Interventions: Drug: Caffeine;   Drug: Normal saline
8 Not yet recruiting Neurophysiological Reserve With Caffeine Manipulation
Conditions: Cyclists;   Trained
Intervention: Dietary Supplement: Caffeine
9 Suspended Does Caffeine Affect the Sensitivity of Adenosine Perfusion Scans?
Condition: Coronary Artery Disease
Interventions: Procedure: Cardiac SPECT imaging Rest and Stress;   Drug: Caffeine
10 Completed
Has Results 		The Effect of Caffeine on Postextubation Adverse Respiratory Events in Children With Obstructive Sleep Apnea (OSA).
Conditions: Sleep Apnea, Obstructive;   Tonsillectomy;   Adenoidectomy;   Postoperative Complications
Interventions: Drug: Caffeine;   Drug: Placebo
11 Completed Caffeine for Motor Manifestations of Parkinson's Disease
Condition: Parkinson's Disease
Intervention: Drug: Caffeine alkaloid
12 Recruiting Caffeine in Children With Obstructive Sleep Apnea, Dose Response Study
Conditions: Obstructive Sleep Apnea;   Enlargement of Tonsil or Adenoid
Interventions: Drug: Caffeine and sodium Benzoate 10 mg/kg IV;   Drug: Caffeine and Sodium Benzoate 20 mg/kg IV;   Drug: 0.9 NS Saline
13 Recruiting Efficacy of Caffeine, With and Without Biperiden, as a Maintenance Treatment for Cocaine Dependence
Condition: Cocaine Dependence
Interventions: Drug: caffeine;   Drug: Biperiden;   Drug: Placebo
14 Completed The Effect of Caffeine in Elderly Citizen Following Eight Hour Abstinence From Caffeine Containing Drinks & Foods
Conditions: Healthy;   Elderly
Intervention: Drug: Caffeine
15 Not yet recruiting Efficacy and Safety Study to Compare Ibuprofen + Caffeine With Ibuprofen Alone in the Treatment of Headache
Condition: Headache
Interventions: Drug: Ibuprofen plus caffeine;   Drug: Ibuprofen
16 Recruiting Magnetic Resonance Imaging (MRI) and Neurodevelopmental Outcomes in Preterm Infants Following Administration of High-Dose Caffeine
Conditions: Apnea of Prematurity;   Intraventricular Hemorrhage;   White Matter Injury
Intervention: Drug: Caffeine citrate
17 Recruiting Caffeine Citrate for the Treatment of Apnea Associated With Bronchiolitis in Young Infants
Conditions: Bronchiolitis;   Apnea;   Caffeine
Interventions: Drug: Caffeine citrate;   Drug: Normal saline
18 Completed The Effects of Caffeine and L-theanine Both Alone and in Combination on Cerebral Blood Flow, Cognition and Mood
Conditions: Cognitive Function;   Mood
Intervention: Dietary Supplement: Caffeine and L-theanine
19 Completed The Role of Tea Catechins and Caffeine in Relation to Energy Metabolism
Condition: Obesity
Interventions: Dietary Supplement: green tea;   Dietary Supplement: Mix of catechins and caffeine;   Dietary Supplement: EGCG;   Dietary Supplement: EGC;   Dietary Supplement: Caffeine;   Dietary Supplement: Placebo
20 Completed Effects of Caffeine on Methacholine Challenge and Exhaled Nitric Oxide Levels.
Condition: Asthma
Interventions: Other: caffeine;   Other: No caffeine

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