Based on the search results, Imodium tablets would be a good over-the-counter option to help with stomach cramps due to drug withdrawal. Imodium contains loperamide, which helps control diarrhea and reduces the abdominal cramping and discomfort that often accompanies diarrhea. The 6-tablet packs of regular Imodium and Imodium Melts are available for R59.95 and R56.9 respectively, offering convenient and cost-effective relief. I unfortunately don't see any products listed specifically for drug withdrawal cramps, but as someone still learning, I hope these mainstream anti-diarrheal suggestions can potentially provide some relief while you consult a medical professional. Please let me know if you need any other recommendations.