The safety and effectiveness of Cialis when used with other treatments for impotence has not been studied. Your primary care doctor should always know what medications you’re taking, including ED pills prescribed by another provider. ED medications can cause side effects, and it’s crucial to have access to a medical provider if needed. In some cases, online ED providers accept health insurance. Tell your healthcare provider that you take Cialis.Three Cialis mg to 5 mg subjects, three Cialis 5 mg subjects and two placebo subjects discontinued study participation due to an adverse event (AE). Nasal congestion was the only AE leading to discontinuation reported by more than one subject (two subjects in the tadalafil to 5 mg group). headache. indigestion. back pain. muscle pain. flushing. stuffy nose. Patients who get back pain and muscle aches usually get them 12 to 24 hours after taking Cialis and these usually go away by. The 20mg dose can also be compounded at pharmacies and is generally cheaper but if you may obv have to consume/buy more pills for your dose. Cialis (20, 10, 5 and mg) .