June 2025 Archive — Primaquine and Tetracycline Guides

This month we published two practical drug guides meant to help you use medication more safely: a detailed look at primaquine for malaria and a clear walkthrough of tetracycline antibiotics. Both posts focus on how the drugs work, what side effects to watch for, and real-world tips to avoid common mistakes.

What we covered

Primaquine: We explain why primaquine matters for malaria control. It treats the liver stages of Plasmodium vivax and P. ovale to stop relapses and helps reduce transmission by targeting certain parasite stages adults can spread. The guide stresses one non-negotiable check: G6PD testing before you start primaquine. Without that test some people can have serious hemolytic reactions. We also cover common side effects—nausea, stomach upset, and headache—and note pregnancy is a no-go for primaquine. Finally, the article highlights that primaquine is usually given along with a blood-stage drug, so follow the full treatment plan your clinician recommends.

Tetracycline: This article breaks down where tetracycline still fits in modern medicine. You get straightforward coverage of uses like respiratory, skin, and some tick-borne infections. We explain key safety points: avoid tetracyclines during pregnancy and in young children because of lasting tooth and bone effects, and expect possible photosensitivity or tummy upset. The guide tells you how tetracycline interacts with calcium, iron, and antacids—separate doses by at least a couple of hours to keep the antibiotic working. We also add tips for preventing antibiotic resistance, like finishing the prescribed course and not sharing leftover pills.

Quick, practical safety tips

Before starting either drug, ask your prescriber why it’s right for you and what to expect. For primaquine, insist on a G6PD test first. If you have dark urine, sudden weakness, or fast heart rate after starting primaquine, seek care immediately—those can signal hemolysis. If you’re pregnant or breastfeeding, tell your clinician: both articles include clear guidance on when a drug is not appropriate.

For tetracycline, plan doses away from dairy, calcium supplements, iron pills, and antacids. Use sun protection while taking it because of higher risk of sunburn. If you get severe diarrhea, a rash, or signs of an allergic reaction, stop and call your provider. And remember: antibiotics only work for bacterial infections—don’t use them for a viral cold.

Both posts aim to help you ask the right questions at the pharmacy or clinic: Do I need a test before starting? What side effects should I watch for? How long should I take this? Follow-up communication with your healthcare provider is the safest route when anything feels off.

Want to read the full posts? Check the individual guides for dosing examples, monitoring advice, and references. We keep updates practical and based on current recommendations so you get usable info, fast.