Applies to caffeine / sodium benzoate: injection solution.
Serious side effects
Along with its needed effects, caffeine/sodium benzoate may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor or nurse immediately if any of the following side effects occur while taking caffeine / sodium benzoate:
Incidence not known
- Extra heartbeats
- fast, pounding, or irregular heartbeat or pulse
- trembling or shaking of the hands or feet
Get emergency help immediately if any of the following symptoms of overdose occur while taking caffeine / sodium benzoate:
Symptoms of overdose
- Chest pain or discomfort
- confusion
- confusion as to time, place, or person
- decreased urination
- dizziness
- dry mouth
- fainting
- fever
- hallucinations
- holding false beliefs that cannot be changed by fact
- increase in heart rate
- lightheadedness
- pounding or rapid pulse
- rapid breathing
- sleeplessness
- slow heartbeat
- sunken eyes
- thirst
- trouble sleeping
- unable to sleep
- unusual excitement, nervousness, or restlessness
- unusual tiredness or weakness
- wrinkled skin
Other side effects
Some side effects of caffeine / sodium benzoate may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.
Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
Incidence not known
- Anxiety
- continuing ringing or buzzing or other unexplained noise in the ears
- headache
- hearing loss
- hyperventilation
- increased sensitivity to pain
- increased sensitivity to touch
- irritability
- restlessness
- shortness of breath
- tingling in the hands and feet
- trouble sleeping
For Healthcare Professionals
Applies to caffeine / sodium benzoate: injectable solution.
General
Large doses of caffeine may cause headache, excitement, agitation, scintillating scotoma, hyperesthesia, tinnitus, muscle tremors or twitches, diuresis, tachycardia, extrasystoles, other cardiac arrhythmias, and a condition resembling anxiety neurosis.[Ref]
