A study of drug interactions between Valtrex, Doxycycline for a Male patient aged 44
This is a personalized study of Valtrex, Doxycycline drug interactions for a 44 year old male patient. The study is created by eHealthMe based on 207 reports from FDA.
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What are the drugs
Valtrex has active ingredients of valacyclovir hydrochloride. It is used in genital herpes, herpes simplex, herpes labialis (oral herpes simplex), herpes zoster, oral herpes, herpes virus infection.
Doxycycline has active ingredients of doxycycline hyclate. It is used in acne, rosacea, infection, malaria, lyme disease, sinusitis.
On Apr, 27, 2013: 207 people who reported to have interactions when taking Valtrex, Doxycycline are studied

Information of the patient in this study:
Age: 44
Gender: male
Conditions: Herpes Virus Infection
Drugs taking:
- Valtrex: used for < 1 month
- Doxycycline
Drug interactions have: Arrhythmia, Condition Aggravated, Drug Ineffective, Herpes Virus Infection
eHealthMe real world results:
For males aged 44 (±5):
Comparison with this patient's adverse outcomes:
(click on each outcome to view in-depth analysis, incl. how people recovered)| Interaction | Number of reports |
| Arrhythmia | 2 (25.00%) |
| Condition Aggravated | 2 (25.00%) |
| Drug Ineffective | 2 (25.00%) |
| Herpes Virus Infection | 2 (25.00%) |
Most common interactions experienced by males aged 44 (±5) in the use of Valtrex, Doxycycline:
(click on each outcome to view in-depth analysis, incl. how people recovered)| Interaction | Number of reports | |
| 1 | Pyrexia | 8 |
| 2 | Rigors | 6 |
| 3 | Hydronephrosis | 6 |
| 4 | Calculus Urinary | 3 |
| 5 | Haematuria Present | 3 |
| 6 | Urinary Tract Obstruction Nos | 3 |
| 7 | Haemorrhage Nos | 3 |
| 8 | Mean Cell Volume Abnormal | 2 |
| 9 | Urine Analysis Abnormal Nos | 2 |
| 10 | Red Blood Cell Count Decreased | 2 |
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Most common interactions experienced by males aged 44 (±5) in long term use of Valtrex, Doxycycline:
(click on each outcome to view in-depth analysis, incl. how people recovered)| None. |
For people in general (regardless of gender or age):
Comparison with this patient's adverse outcomes:
(click on each outcome to view in-depth analysis, incl. how people recovered)| Interaction | Number of reports |
| Arrhythmia | 2 (0.97%) |
| Condition Aggravated | 5 (2.42%) |
| Drug Ineffective | 6 (2.90%) |
| Herpes Virus Infection | 2 (0.97%) |
Most common interactions experienced by people in the use of Valtrex, Doxycycline:
(click on each outcome to view in-depth analysis, incl. how people recovered)| Interaction | Number of reports | |
| 1 | Anxiety | 207 |
| 2 | Vomiting | 110 |
| 3 | Pain | 102 |
| 4 | Nausea | 77 |
| 5 | Bone Disorder | 67 |
| 6 | Osteonecrosis Of Jaw | 65 |
| 7 | Emotional Distress | 64 |
| 8 | Injury | 59 |
| 9 | Pain In Jaw | 59 |
| 10 | Deformity | 51 |
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Most common interactions experienced by people in long term use of Valtrex, Doxycycline:
(click on each outcome to view in-depth analysis, incl. how people recovered)| Interaction | Number of reports | |
| 1 | Palpitations | 1 |
| 2 | Anxiety | 1 |
| 3 | Panic Attack | 1 |
| 4 | Suicidal Ideation | 1 |
| 5 | Headache | 1 |
| 6 | Dizziness | 1 |
| 7 | Depression | 1 |
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Next: study your drugs
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In-depth study of side effects (who have it, when it happens and how):
- Arrhythmia (Arrhythmias) in Valtrex (123 reports)
- Arrhythmia (Arrhythmias) in Doxycycline (133 reports)
- Condition Aggravated in Valtrex (220 reports)
- Condition Aggravated in Doxycycline (195 reports)
- Herpes Virus Infection in Valtrex (229 reports)
- Herpes Virus Infection in Doxycycline (20 reports)
Could it be a symptom from a condition:
- Arrhythmia (Arrhythmias) in Herpes Virus Infection (5 reports)
- Condition Aggravated in Herpes Virus Infection
- Herpes Virus Infection in Herpes Virus Infection
Drug effectiveness in real world:
- Valtrex for Herpes Virus Infection reported by 54 people (updated 2 days ago)
Alternative drugs:
- Herpes Virus Infection (4 drugs) (updated 2 days ago)
Comments from related studies:
From this study (2 months ago):
From this study (4 years ago):
From this study (43 years ago):
inquiring to see if both drugs can be used at the same time
all my medication along with vitamins have to be taken separately to avoid stomach problems or headaches
I have heart problems, stomach ache, dizziness, nausea
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