Gabapentin vs Tramadol
Tramadol
Drug Class
Anticonvulsant, Neuropathic pain agent
Opioid analgesic (synthetic opioid)
Primary Indications
- Neuropathic pain - Epilepsy (partial seizures) - Postherpetic neuralgia
- Moderate to severe pain - Chronic pain management
Mechanism of Action
Modulates calcium channels to reduce nerve signal transmission, relieving neuropathic pain.
Binds to opioid receptors and inhibits norepinephrine/serotonin reuptake, reducing pain perception.
Dosage Forms
Capsules, tablets, oral solution
Tablets, extended-release tablets, oral solution
Common Dosages
- Neuropathic pain: 300–3600 mg/day (divided doses) - Epilepsy: 900–1800 mg/day (divided doses)
- Immediate-release: 50–100 mg every 4–6 hours as needed (max 400 mg/day) - Extended-release: 100–300 mg once daily
Onset of Action
1–3 hours
1 hour
Duration of Action
5–7 hours
4–6 hours (immediate release); up to 24 hours (extended release)
Half-Life
5–7 hours
6–7 hours
Common Side Effects
- Drowsiness - Dizziness - Fatigue - Peripheral edema - Weight gain
- Nausea - Dizziness - Drowsiness - Constipation - Dry mouth
Serious Side Effects
- Respiratory depression (rare) - Severe allergic reactions - Increased risk of suicidal thoughts
- Respiratory depression - Seizures - Serotonin syndrome (if combined with certain drugs) - Dependence and withdrawal
Pregnancy Category
Category C (Risk cannot be ruled out)
Category C (Risk cannot be ruled out)
Controlled Substance
No
Schedule IV
Addiction Potential
Low
Moderate to high
Drug Interactions
- CNS depressants (increased sedation) - Antacids (may reduce absorption)
- CNS depressants (increased sedation) - SSRIs, SNRIs (risk of serotonin syndrome)
Monitoring Parameters
- Pain relief - Mood changes (suicidal ideation) - Renal function
- Pain relief - Signs of misuse or addiction - Respiratory function
Withdrawal Symptoms
- Anxiety - Insomnia - Nausea - Increased pain sensitivity
- Sweating - Restlessness - Diarrhea - Muscle aches - Seizures
Special Considerations
- Titrate dose gradually to reduce side effects. - Abrupt discontinuation may cause withdrawal symptoms.
- Use cautiously in patients with a history of substance abuse. - Avoid abrupt discontinuation to prevent withdrawal.
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