Drug of choice for renal colic –
**Core Concept**
The management of renal colic involves the use of analgesics to alleviate pain, with a focus on medications that are effective, safe, and do not exacerbate the underlying condition. Renal colic is often caused by the passage of a kidney stone, and the pain can be severe and debilitating.
**Why the Correct Answer is Right**
Voveran (Diclofenac) is a nonsteroidal anti-inflammatory drug (NSAID) that is commonly used to treat renal colic. Its mechanism of action involves the inhibition of cyclooxygenase (COX) enzymes, which are responsible for the production of prostaglandins and thromboxanes. These eicosanoids play a crucial role in the mediation of pain and inflammation. By blocking the production of these molecules, Diclofenac reduces pain and inflammation in the kidneys, providing relief from the symptoms of renal colic.
**Why Each Wrong Option is Incorrect**
**Option A:** Methadone is an opioid analgesic that is used to treat moderate to severe pain, but it is not the drug of choice for renal colic due to its potential for side effects, such as respiratory depression and constipation. Methadone is also a controlled substance, which limits its use in this context.
**Option B:** Pentazocine is a mixed agonist-antagonist opioid analgesic that can be used to treat moderate to severe pain. However, it is not typically used for renal colic due to its potential for side effects, such as hallucinations and confusion.
**Option D:** Piroxicam is another NSAID that is used to treat pain and inflammation, but it is not the first-line treatment for renal colic due to its longer half-life and potential for gastrointestinal side effects.
**Clinical Pearl / High-Yield Fact**
When managing renal colic, it is essential to consider the underlying cause of the pain and to choose a treatment that addresses the root cause. In many cases, renal colic is caused by a kidney stone, and the treatment may involve medical expulsive therapy (MET) with alpha-blockers or NSAIDs to facilitate the passage of the stone.
**✓ Correct Answer: C. Voveran**