When to Consult a Doctor

Contact your doctor immediately if you experience severe allergic reactions such as difficulty breathing, swelling of your face, lips, or tongue, or hives after taking Zantac or doxycycline. These are signs of a serious allergic reaction requiring immediate medical attention.

Side Effects Requiring Medical Attention

Seek medical advice if you notice persistent or worsening side effects. For Zantac, this includes severe diarrhea, stomach pain, or changes in urination. With doxycycline, watch for severe nausea, vomiting, unusual fatigue, or unexplained bruising or bleeding. These symptoms may indicate more serious problems.

Drug Interactions and Concerns

Always inform your doctor about all medications, including over-the-counter drugs and supplements, you are taking before starting Zantac or doxycycline. Certain combinations can lead to adverse interactions. If you experience unexpected symptoms or changes in the effectiveness of other medications, consult your physician. Discuss any concerns you have regarding potential drug interactions with your healthcare provider.

Persistent Symptoms

Don’t hesitate to contact your doctor if your symptoms persist despite treatment with Zantac or doxycycline. This could suggest the need for alternative treatments or further investigation.