1. Clinical Overview
A fixed-dose combination analgesic and antispasmodic medication used for the management of moderate to severe pain associated with smooth muscle spasm, particularly in abdominal and renal colic. Dicyclomine provides anticholinergic and antispasmodic action, Paracetamol acts as a central analgesic and antipyretic, and Tramadol is a centrally-acting opioid analgesic with dual mechanism (mu-opioid receptor agonist and serotonin/norepinephrine reuptake inhibition). This combination is particularly relevant in the Indian context for treating pain from conditions like renal calculi, biliary colic, and dysmenorrhea.
| Onset | Duration | Bioavailability |
|---|---|---|
| Oral: Tramadol - 30-60 minutes; Paracetamol - 30-60 minutes; Dicyclomine - 30-60 minutes. | Tramadol: 4-6 hours; Paracetamol: 4-6 hours; Dicyclomine: 4-6 hours. | Tramadol: ~70-75%; Paracetamol: ~85-98%; Dicyclomine: ~67-73%. |
2. Mechanism of Action
The combination provides multimodal analgesia and spasmolysis. Tramadol binds to μ-opioid receptors and weakly inhibits serotonin and norepinephrine reuptake in the CNS, altering pain perception. Paracetamol's exact mechanism is unclear but involves central COX inhibition, activation of descending serotonergic pathways, and possible CB1 receptor interaction. Dicyclomine is a direct smooth muscle relaxant (papaverine-like) and a competitive muscarinic acetylcholine receptor antagonist, reducing spasms in the GI and genitourinary tracts.
3. Indications & Uses
- Moderate to severe pain associated with smooth muscle spasm (Renal colic, Biliary colic)
- Severe dysmenorrhea with abdominal cramping
- Post-operative pain with associated visceral spasm
4. Dosage & Administration
Adult Dosage: 1 tablet every 4-6 hours as needed for pain. Maximum: 4 tablets in 24 hours. Should be used at the lowest effective dose for the shortest duration.
Administration: Take with or after food to minimize gastric upset. Swallow whole with a glass of water. Do not crush, chew, or break. Do not consume alcohol. Can be taken for acute episodes; treatment duration should not exceed 5 days without medical supervision.
5. Side Effects
Common side effects may include:
- Nausea, Vomiting
- Dizziness, Drowsiness, Lightheadedness
- Dry mouth
- Constipation
- Sweating
- Headache
6. Drug Interactions
| Drug | Effect | Severity |
|---|---|---|
| CNS Depressants (Alcohol, Benzodiazepines, Barbiturates) | Additive CNS depression, respiratory depression, sedation | Major |
| MAO Inhibitors (Phenelzine, Selegiline) | Risk of serotonin syndrome, hyperpyrexia, seizures | Contraindicated |
| SSRIs/SNRIs (Fluoxetine, Sertraline, Venlafaxine) | Increased risk of serotonin syndrome | Major |
| Other Anticholinergics (Atropine, Antihistamines, TCAs) | Additive anticholinergic effects (dry mouth, urinary retention, constipation) | Major |
| CYP2D6 Inhibitors (Quinidine, Fluoxetine, Paroxetine) | Reduced conversion of Tramadol to active M1 metabolite, may decrease analgesia | Moderate |
| CYP3A4 Inducers (Rifampicin, Carbamazepine, Phenytoin) | Increased Tramadol metabolism, reduced efficacy | Moderate |
| Warfarin | Paracetamol may potentiate anticoagulant effect with chronic high doses | Moderate |
| Metoclopramide, Domperidone | Antagonized by Dicyclomine's anticholinergic effect | Moderate |
7. Patient Counselling
- DO take exactly as prescribed by the doctor.
- DO take with food if stomach upset occurs.
- DO inform your doctor about all other medicines you are taking.
- DO keep track of your total daily Paracetamol intake (including from other cold/flu remedies).
- DONT consume alcohol in any form.
- DONT drive or operate machinery until you know your reaction.
- DONT share this medicine with anyone.
- DONT stop abruptly if used for more than a few weeks (Tramadol withdrawal).
8. Toxicology & Storage
Overdose: Tramadol/Paracetamol/Dicyclomine Triad: Early: Nausea, vomiting, sweating, dizziness, drowsiness, dry mouth, blurred vision, tachycardia. Severe: CNS depression progressing to coma, respiratory depression, seizures (Tramadol), acute liver failure (Paracetamol >10g), delirium, hyperthermia, serotonin syndrome, cardiac arrest.
Storage: Store below 30°C in a cool, dry place, protected from light and moisture. Keep in the original blister pack or container. Keep out of reach of children and pets. Do not flush unused medication. Dispose of as per local pharmacy guidelines.