Your symptoms of fever, body pain, tiredness, nasal congestion, and throat pain are most commonly due to a viral infection such as flu, where antibiotics like Mahacef 200 (cefixime) are usually not needed unless a doctor has confirmed a bacterial infection. Diclogesic can reduce pain and fever temporarily, but it should not be used repeatedly without medical guidance. The most appropriate approach at this stage is rest, drinking plenty of fluids, steam inhalation for nasal blockage, warm saltwater gargles for throat pain, and taking a painkiller when needed. Most viral infections improve within a few days, but if fever persists beyond 3-4 days, becomes very high, or you develop breathing difficulty, severe weakness, or worsening throat symptoms, you should consult a doctor for further evaluation and tests if required.

Severe tooth pain in a tooth next to one that has already had a root canal is often due to a new cavity, gum infection, or a problem with the surrounding tooth or bite, and it usually needs dental treatment rather than just medicines. While you can take a simple pain reliever for temporary relief and avoid chewing on that side, it is not advisable to start antibiotics like cefixime-clavulanate again without a dentist's evaluation, as they are only needed if there is a clear infection with swelling or fever. The most important step is to visit a dentist for examination and possibly an X-ray to find the exact cause. Treatment may include a filling, cleaning, or root canal if required. Seek urgent care if you develop swelling, fever, or worsening pain.

Mahacef C V is not suitable for toenail infections. Most toenail infections are fungal, and this medicine only treats bacterial infections. For your condition, it is crucial to consult a doctor for a proper diagnosis and treatment plan. Using an antibiotic like Mahacef CV for a fungal infection is unlikely to be effective and may contribute to the development of antibiotic resistance, a serious health concern.