Based on PubMed | Can I drink energy drinks at night while taking prednisone, or will this increase the risk of insomnia, anxiety, or elevated blood pressure?

Drinking energy drinks at night while taking prednisone is generally not advisable because it can increase the chance of insomnia, anxiety or “jitters,” and temporary blood pressure elevations. Both prednisone and energy drinks can disturb sleep and mood, and caffeine in energy drinks can raise blood pressure and heart rate, so their effects may add up, especially in the evening. ^{[1] [2] [3] [4]}

Why this matters

• Prednisone commonly causes short‑term side effects such as insomnia and mood changes (feeling on edge, agitation), and it can contribute to fluid retention and blood pressure increases, particularly at higher doses. ^{[1] [5]}
• Energy drinks contain high and variable amounts of caffeine, which can cause anxiety, nervousness, and insomnia, and can also raise blood pressure in the short term. ^{[6] [3] [7]}
• Taken together especially at night these overlapping effects can make sleep problems and anxiety more likely, and may lead to a higher blood pressure bump than either would cause alone. Caffeine has been shown to elevate blood pressure at rest and under stress, and the elevations add to other stressors. ^[4]

What official sources say about each

• Prednisone: Short courses can lead to trouble sleeping and mood swings, and longer or higher doses can contribute to higher blood pressure. ^{[1] [2] [5]}
• Energy drinks/caffeine: Energy drinks may cause anxiety, insomnia, dehydration, and heart-related issues; caffeine’s content can vary widely and labels may understate amounts. ^{[3] [6]}
• Caffeine in humans can cause anxiety and modest blood pressure increases, even in healthy adults. ^[7]

Practical guidance you can use

• Timing: If you must use caffeine, avoid energy drinks within at least 6–8 hours of bedtime, and ideally take prednisone in the morning to reduce sleep disturbance. Taking both in the evening increases the odds of insomnia. ^{[1] [2]}
• Dose matters: The higher your prednisone dose and the more caffeine you consume, the more likely you are to experience sleep trouble, palpitations, and blood pressure spikes. ^{[1] [5] [7]}
• Monitor: If you continue to use caffeine, check your blood pressure during the course of prednisone and watch for new or worsening restlessness, anxiety, racing heart, or insomnia. Cut back or stop caffeine if these occur. ^{[5] [1]}
• Safer swaps at night: Consider decaf tea, herbal tea, or water, and avoid energy drinks while you’re on prednisone particularly in the evening to lower the risk of sleep and mood problems. Remember that some sodas, pre‑workout supplements, and chocolate also contain caffeine. ^[6]

Quick comparison

Factor	Prednisone	Energy drinks (caffeine)	Combined risk at night
Sleep	Can cause insomnia	Causes insomnia	Higher risk of insomnia together [1] [3]
Anxiety/jitters	Can cause agitation/mood changes	Can cause anxiety/jitters	Additive nervousness/jitters [1] [7]
Blood pressure	Can raise BP in some people	Raises BP transiently	Greater chance of elevated BP [5] [4]

Each of the effects listed for prednisone and caffeine has been documented individually; when used together, particularly close to bedtime, the overlap in side effects makes problems more likely, even though there isn’t a specific drug–drug interaction that universally prohibits caffeine. ^{[1] [5] [3] [4]}

Bottom line

It would be wiser to avoid energy drinks at night while taking prednisone because they can meaningfully increase the chance of insomnia, anxiety, and temporary blood pressure elevation. If you choose to consume caffeine, keep it moderate, earlier in the day, and monitor how you feel and what your blood pressure does. ^{[1] [2] [3] [4]}