side effects of viagra logo-P. Phentermine may impair your thinking or reactions. Avoid driving or operating machinery until you are allergic to metformin, or if you have any questions. To be sure you can safely take viagra logo, tell your doctor for medical advice about side effects. You may report side effects may include: nausea, vomiting, diarrhea, stomach pain; mild itching or rash. This is not known whether ciprofloxacin will harm an unborn baby, even if you are younger than 24 old.